If you’re planning a 1999 Civic swap, you’ll want options that balance power, reliability, and fitment without surprises. I’ll outline the top builds—from K-series monsters to classic B-series upgrades—plus the mounts, harnesses, and clutch lines you’ll need to make them work. Pick your goal and I’ll help you avoid the common pitfalls that can stall a great project.
| K-swap Flexible Engine Conversion Wiring Harness for Honda Civic |  | Best For Wiring | Compatibility (vehicle/engine): Honda Civic K20A/K20/K24 (1999–2000) | Purpose (swap/mount/harness/line): Engine conversion wiring harness (K-swap) | Material/Construction: Insulated wiring with braided shielding layers | VIEW LATEST PRICE | Read Our Analysis |
| A-Premium Front Engine Motor Mount Kit (2PC) |  | Best Value Mounts | Compatibility (vehicle/engine): Honda Civic (1992–2000), Civic del Sol (1993–1997), CR-V (1997–2001), Acura Integra (1997–2001) | Purpose (swap/mount/harness/line): Front engine motor mount kit (2pc) | Material/Construction: Metal with rubber/engine-mount materials (OE-equivalent) | VIEW LATEST PRICE | Read Our Analysis |
| AJP D-to-B Series Engine Swap Motor Mounts Kit |  | B-Series Specialists | Compatibility (vehicle/engine): Honda Civic (1996–2000 EJ/EK/EM) — B-Series engines (B16/B17/B18/B20) | Purpose (swap/mount/harness/line): Engine swap motor mounts kit (D-to-B series) | Material/Construction: Steel motor mounts | VIEW LATEST PRICE | Read Our Analysis |
| Honda Civic EK Engine Swap Mount Kit (1996–2000) |  | OE-Fit Replacement | Compatibility (vehicle/engine): Honda Civic EK (1996–2000) | Purpose (swap/mount/harness/line): Engine swap mount kit (3-bolt EK) | Material/Construction: High-quality materials meeting OE standards (metal/rubber) | VIEW LATEST PRICE | Read Our Analysis |
| K-Series Clutch Line Hose Kit for Honda/Acura |  | Essential Hydraulic Upgrade | Compatibility (vehicle/engine): Honda/Acura (Civic 1988–2000, Del Sol 1993–1997, CR-V 1997–2001, CRX 1988–1991, Integra 1990–2001) — K-Series | Purpose (swap/mount/harness/line): Clutch line hose kit for K-swap | Material/Construction: Stainless steel braided hose with PVC cover | VIEW LATEST PRICE | Read Our Analysis |
| PAROD Engine Mounts for Honda Civic Acura Integra |  | Budget Replacement | Compatibility (vehicle/engine): Acura Integra (1997–2001), Honda Civic (1992–2000), Civic del Sol (1993–1997), CR-V (1997–2001) | Purpose (swap/mount/harness/line): Engine motor mounts (2pc replacement) | Material/Construction: Metal mounts with OE-equivalent materials (metal/rubber) | VIEW LATEST PRICE | Read Our Analysis |
| K-Series Engine Swap Mount Bracket for 1996–2001 Civics |  | K-Swap Foundation | Compatibility (vehicle/engine): Honda Civic EK (1996–2000) — K-Series (K20/K24) | Purpose (swap/mount/harness/line): K-series engine swap mount bracket | Material/Construction: Robust metal with powder-coated/rust-resistant finish | VIEW LATEST PRICE | Read Our Analysis |
| Engine Swap Motor Mounts for 1996–2000 EK Civic |  | Performance-Focused | Compatibility (vehicle/engine): Honda Civic (1996–2000 EK) — H22/H23 H-Series | Purpose (swap/mount/harness/line): Engine swap motor mounts (H22/H23 conversion) | Material/Construction: Solid polyurethane mounts | VIEW LATEST PRICE | Read Our Analysis |
| ECOTRIC Rear Engine Mount T Bracket for Honda Civic |  | Rear Support Upgrade | Compatibility (vehicle/engine): Honda Civic B16 Si (1999–2000) — rear mount T bracket for B16 swaps | Purpose (swap/mount/harness/line): Rear engine mount T bracket | Material/Construction: Reinforced high-quality steel (painted gloss black) | VIEW LATEST PRICE | Read Our Analysis |
| Munirater Engine Swap Mount Bracket for Honda Civic |  | Heavy-Duty Choice | Compatibility (vehicle/engine): Honda Civic (1996–2000 EK) — K-Series (K20/K24) | Purpose (swap/mount/harness/line): Engine swap mount bracket (K-series) | Material/Construction: Metal mount bracket built/tested for durability | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
K-swap Flexible Engine Conversion Wiring Harness for Honda Civic
If you’re swapping a K-series into a 1999 Civic, the K-swap Flexible Engine Conversion Wiring Harness is one of the best choices because it’s compact, lightweight, and built to handle K20/K24 electrical demands without eating up valuable engine-bay space. You’ll appreciate its durable insulation for reliable conductivity and long service life. The tight shielding layer reduces electromagnetic interference, so sensors and actuators keep stable signals. Reinforced braided layers and flexible materials give excellent bending resistance, surviving tens of thousands of cycles in testing. Installers find it easy to route and trust its build quality to simplify the K-swap wiring work.
- Compatibility (vehicle/engine):Honda Civic K20A/K20/K24 (1999–2000)
- Purpose (swap/mount/harness/line):Engine conversion wiring harness (K-swap)
- Material/Construction:Insulated wiring with braided shielding layers
- Fitment / Installation notes:Designed compact/lightweight for fit in K-swaps (1999–2000)
- Warranty / Guarantee or Support:Durability tested (environmental/bend tests) — implied reliability (no explicit warranty listed)
- Intended gain (performance/benefit):Stable signal transmission and reduced wiring bulk; anti-interference
- Additional Feature:Tightly shielded wiring
- Additional Feature:Reinforced braided layers
- Additional Feature:Lightweight compact design
A-Premium Front Engine Motor Mount Kit (2PC)
The A-Premium Front Engine Motor Mount Kit (2PC) is a great choice if you’re swapping or upgrading a 1999 Civic and need OE-fit mounts that handle a range of engines (1.5–2.0L); it includes front right (A6520) and front left (A6502) mounts tested to meet or exceed OEM specs. You’ll get compatibility across Civic (1992–2000), Civic del Sol, CR-V (1997–2001 2.0L) and Acura Integra (1997–2001 1.8L). Use the listed reference numbers when ordering to guarantee fitment. A-Premium backs the kit with a one-year unlimited-mileage guarantee, giving you straightforward assurance for your swap.
- Compatibility (vehicle/engine):Honda Civic (1992–2000), Civic del Sol (1993–1997), CR-V (1997–2001), Acura Integra (1997–2001)
- Purpose (swap/mount/harness/line):Front engine motor mount kit (2pc)
- Material/Construction:Metal with rubber/engine-mount materials (OE-equivalent)
- Fitment / Installation notes:Direct-fit replacements (includes left/right mounts)
- Warranty / Guarantee or Support:One-year unlimited-mileage guarantee
- Intended gain (performance/benefit):Restores engine support, reduces movement—meets OE performance
- Additional Feature:OE reference numbers listed
- Additional Feature:Includes left/right mounts
- Additional Feature:1-year unlimited mileage
AJP D-to-B Series Engine Swap Motor Mounts Kit
For builders swapping a B-series into a 1996–2000 Civic who need a durable, bolt-in solution, AJP’s D-to-B Series motor mount kit gives a precise fit for B16/B17/B18/B20 engines with the 3-bolt driver-side mount. You’ll get steel motor mounts engineered for EJ/EK/EM chassis Civics with manual transmissions, covering B16, B17, B18, B20, B18A and B18C applications. The kit is new, carries a warranty, and uses manufacturer part number MM-022RD-AMA-L1. No installation guide is included, so plan professional installation to guarantee proper alignment and torque. This kit simplifies fitment while keeping engine placement and drivetrain geometry reliable.
- Compatibility (vehicle/engine):Honda Civic (1996–2000 EJ/EK/EM) — B-Series engines (B16/B17/B18/B20)
- Purpose (swap/mount/harness/line):Engine swap motor mounts kit (D-to-B series)
- Material/Construction:Steel motor mounts
- Fitment / Installation notes:For manual-transmission Civics with 3-bolt driver side B-series mounts; no install guide included
- Warranty / Guarantee or Support:Warranty included (new condition); manufacturer part number provided
- Intended gain (performance/benefit):Enables B-series engine swaps (secure motor mounting)
- Additional Feature:Steel motor mounts
- Additional Feature:Fits 3-bolt driver mount
- Additional Feature:Manufacturer part MM-022RD-AMA-L1
Honda Civic EK Engine Swap Mount Kit (1996–2000)
Owners planning an EK engine swap who want a bolt-in, reliably tested solution will appreciate the Engine Swap Mount Kit 3-Bolt M1003, made specifically for 1996–2000 Honda Civic EK models. You’ll get mounts engineered to meet or exceed OE specifications, built from excellent materials and subjected to extensive lab and vehicle fitment testing. That means precise performance and maximum durability across everyday driving and spirited use. The kit’s quality control guarantees consistent fitment, reducing fabrication headaches and installation time. With a broad product range backing it, you’ll have confidence the mounts support your swap and provide long-term peace of mind.
- Compatibility (vehicle/engine):Honda Civic EK (1996–2000)
- Purpose (swap/mount/harness/line):Engine swap mount kit (3-bolt EK)
- Material/Construction:High-quality materials meeting OE standards (metal/rubber)
- Fitment / Installation notes:Vehicle-fit tested; 3-bolt fitment (M1003)
- Warranty / Guarantee or Support:Quality assurance through testing; meets/exceeds OE (warranty not specified)
- Intended gain (performance/benefit):Reliable performance and maximum durability for swaps
- Additional Feature:3-bolt M1003 design
- Additional Feature:Lab and fitment tested
- Additional Feature:Exceeds OE specifications
K-Series Clutch Line Hose Kit for Honda/Acura
If you’re swapping in a K-series engine and want a reliable clutch line that bolts in without custom fabrication, this stainless-steel braided hose kit is a smart choice — it’s built to resist corrosion and fits K20/K24 conversions for 1988–2001 Civics, CRX, Del Sol, CR-V, and Integra models. You’ll get a stainless braided line with a PVC black cover that meets or exceeds OE specs, plus one clutch line, three fittings, and two mounting clamps. It installs directly from the master cylinder (180°) to the slave (90°). Besttruck backs it with a 30-day return policy and one-year warranty.
- Compatibility (vehicle/engine):Honda/Acura (Civic 1988–2000, Del Sol 1993–1997, CR-V 1997–2001, CRX 1988–1991, Integra 1990–2001) — K-Series
- Purpose (swap/mount/harness/line):Clutch line hose kit for K-swap
- Material/Construction:Stainless steel braided hose with PVC cover
- Fitment / Installation notes:Direct install orientation: master cylinder (180°) to slave (90°); includes clamps/fittings
- Warranty / Guarantee or Support:30-day returns and one-year warranty (Besttruck)
- Intended gain (performance/benefit):Improved clutch line durability, corrosion resistance, direct-fit routing
- Additional Feature:Stainless braided line
- Additional Feature:Direct master-to-slave routing
- Additional Feature:Includes clamps & fittings
PAROD Engine Mounts for Honda Civic Acura Integra
Whether you’re swapping in a B-series or upgrading a stock D-series, the PAROD engine mounts give you OE-level fit and a budget-friendly option that keeps vibration and movement in check. You get two mounts: Front Right (#A6520) and Front (#A6502), compatible with 1992–2000 Civics, 1993–1997 Civic del Sol, 1997–2001 Integra and CR-V models. PAROD matches OEM performance using quality materials, vehicle-tested fitment, and a 3-year protection guarantee. Installation is straightforward for most swaps, and replacement numbers simplify ordering. If something’s off, contact MACEL via Amazon email for responsive customer support and warranty help.
- Compatibility (vehicle/engine):Acura Integra (1997–2001), Honda Civic (1992–2000), Civic del Sol (1993–1997), CR-V (1997–2001)
- Purpose (swap/mount/harness/line):Engine motor mounts (2pc replacement)
- Material/Construction:Metal mounts with OE-equivalent materials (metal/rubber)
- Fitment / Installation notes:Direct-fit replacements; vehicle-tested
- Warranty / Guarantee or Support:3-year protection guarantee; customer support via Amazon/email
- Intended gain (performance/benefit):OE-level performance at lower cost; longer service life
- Additional Feature:Replacement numbers A6520/A6502
- Additional Feature:3-year protection guarantee
- Additional Feature:Vehicle-tested fitment
K-Series Engine Swap Mount Bracket for 1996–2001 Civics
A K-Series engine swap mount bracket made specifically for 1996–2000 EK Civics is ideal for DIY tuners and weekend builders who want a durable, plug-and-play solution for fitting K20 or K24 powerplants into a 1999 Civic; it’s crafted from robust metal, powder-coated to resist rust, and comes with all the necessary bolts so you can mount the engine solidly without hunting for missing hardware. You’ll get an OSIAS new K-Swap EK mount (OT-JL007), 26.4 lb, 20x10x9 in, designed to secure bell housing, starter, and oil pan. Rated 4.6/5, it includes a 30-day Amazon return policy.
- Compatibility (vehicle/engine):Honda Civic EK (1996–2000) — K-Series (K20/K24)
- Purpose (swap/mount/harness/line):K-series engine swap mount bracket
- Material/Construction:Robust metal with powder-coated/rust-resistant finish
- Fitment / Installation notes:Includes necessary bolts for bell housing/starter/oil pan; straightforward install
- Warranty / Guarantee or Support:30-day return guarantee through Amazon (warranty/return policy)
- Intended gain (performance/benefit):Strong, rust-resistant bracket for secure K-swap mounting
- Additional Feature:Powder-coated rust-resistant
- Additional Feature:All bolts included
- Additional Feature:OSIAS manufacturer model OT-JL007
Engine Swap Motor Mounts for 1996–2000 EK Civic
For Civic owners planning an H22/H23 swap, these polyurethane motor mounts deliver the rigidity you need to control engine movement and reduce wheel hop during aggressive launches. You’ll get conversion mounts made for 1996–2000 EK Civics to accommodate H22/H23 H‑Series installs from B/D to H/F series. Constructed from solid polyurethane, they’re stronger and more durable than factory rubber, routing more power to the wheels but increasing cabin vibration. Installation isn’t plug‑and‑play: you’ll cut the OEM transmission mount and drill for the new bracket. If you want tighter response and don’t mind extra NVH, these mounts fit the bill.
- Compatibility (vehicle/engine):Honda Civic (1996–2000 EK) — H22/H23 H-Series
- Purpose (swap/mount/harness/line):Engine swap motor mounts (H22/H23 conversion)
- Material/Construction:Solid polyurethane mounts
- Fitment / Installation notes:Requires cutting OEM transmission mount and drilling for new bracket (not direct bolt-in)
- Warranty / Guarantee or Support:No explicit warranty mentioned in summary (material/performance noted)
- Intended gain (performance/benefit):Reduces engine motion/wheel hop; increases power transfer (polyurethane stiffer)
- Additional Feature:Solid polyurethane construction
- Additional Feature:Reduces wheel hop
- Additional Feature:Requires OEM transmission cutting
ECOTRIC Rear Engine Mount T Bracket for Honda Civic
If you’re swapping in a B16 Si into a 1999–2000 Civic, the ECOTRIC Rear Engine Mount T Bracket is a must-have for securing the engine where the original mounts won’t fit. You’ll get a single glossy-black, painted bracket made from reinforced high-quality steel, built to meet or exceed original specs. It’s intended specifically for B16 swaps into Civics that didn’t come with that engine and replaces part number 50827-S04-N10. ECOTRIC applies strict quality control, so fitment and durability are reliable. Note: the package includes only the bracket; an instruction manual isn’t included, so plan accordingly.
- Compatibility (vehicle/engine):Honda Civic B16 Si (1999–2000) — rear mount T bracket for B16 swaps
- Purpose (swap/mount/harness/line):Rear engine mount T bracket
- Material/Construction:Reinforced high-quality steel (painted gloss black)
- Fitment / Installation notes:Replacement rear T bracket for B16 Si — instruction manual not included
- Warranty / Guarantee or Support:No instruction manual; built to meet/exceed specs (warranty not specified)
- Intended gain (performance/benefit):Provides necessary rear mount support for B16 swap where none existed
- Additional Feature:Glossy black painted finish
- Additional Feature:Replacement 50827-S04-N10
- Additional Feature:Reinforced high-quality steel
Munirater Engine Swap Mount Bracket for Honda Civic
Munirater’s engine swap mount bracket is ideal for Civic owners who want a durable, direct-fit solution for K20/K24 swaps in the 1996–2000 EK chassis. You’ll get a replacement bracket designed specifically for Honda 96–00 Civics carrying K Series K20 or K24 engines, engineered for precise fitment. Munirater tests all parts during manufacturing, so you can expect strong durability and consistent performance. The bracket manages engine torque and damps excess noise and vibration, reducing strain on the transmission mount. Before buying, check product images carefully to confirm compatibility with your specific swap and mounting needs.
- Compatibility (vehicle/engine):Honda Civic (1996–2000 EK) — K-Series (K20/K24)
- Purpose (swap/mount/harness/line):Engine swap mount bracket (K-series)
- Material/Construction:Metal mount bracket built/tested for durability
- Fitment / Installation notes:Check images for compatibility; designed for EK K-series swaps
- Warranty / Guarantee or Support:Tested during manufacturing; return/compatibility guidance suggested (warranty not specified)
- Intended gain (performance/benefit):Proper torque management and vibration dampening for K-swap installs
- Additional Feature:Designed for K20/K24 EK
- Additional Feature:Torque management focus
- Additional Feature:Quality-tested components
Factors to Consider When Choosing an Engine Swap For 1999 Honda Civic
When picking an engine swap for your 1999 Civic, you’ll want to check fitment and compatibility so the motor, mounts, and brackets actually line up. Set clear power goals and choose a transmission that can handle the torque and bolt up without excessive modification. Don’t forget wiring and electronics—ECU, sensors, and harness work can make or break the install.
Fitment and Compatibility
Because engine swaps change how power, weight, and wiring interface with the Civic, you’ll need to confirm mount and harness compatibility, check whether chassis or transmission mounts need modification, and factor in the new engine’s weight and dimensions so suspension and handling aren’t compromised. Start by verifying engine and motor mount fit for your specific 1999 Civic model and chosen engine type to avoid alignment issues. Match the wiring harness to the engine series; some swaps demand specific harnesses or pin modifications for sensors and ECU communication. Inspect chassis and transmission mounts—some setups need custom brackets or reinforcement. Account for engine weight and size so springs, shocks, and frame can handle it. Finally, list extra parts like clutch lines or transmission adapters before you buy.
Power Goals
Having confirmed fitment and wiring, the next step is to set clear power goals so you pick an engine that matches how you’ll use the Civic. Decide target horsepower and torque with your drivetrain and suspension limits in mind — mismatched torque can overwhelm axles or cause poor handling. Consider power-to-weight: a lighter Civic needs less peak power to feel quick. Plan for aftermarket support: chasing high numbers means upgrading fuel delivery, exhaust, cooling, and likely engine management. Balance streetability versus outright performance; aggressive cams, turbo spools, or high-strung builds reduce everyday comfort and low-end response. Be realistic: daily drivers, track cars, and show builds demand different targets. Pick a goal that aligns with intended use so supporting components and costs stay manageable.
Transmission Choice
If you’re swapping an engine into a ’99 Civic, choosing the right transmission is as important as picking the motor itself — it must match the engine’s output, fit the chassis, and suit your driving goals. You’ll typically prefer a manual for swapped K20s or K24s because manuals handle higher power and give better driver control. Check gear ratios carefully: short gears boost acceleration but can hurt highway economy, while taller gears do the opposite. Remember transmission weight affects balance and handling; heavier boxes can shift the car’s dynamics. Confirm bolt patterns and mounting point alignment with the Civic’s chassis early to avoid surprises — mismatches may require fabrication or adapters. Match clutch and flywheel selections to guarantee reliable engagement and longevity.
Mounts and Brackets
Mounts and brackets are the literal connection between your new engine and the Civic’s chassis, so pick components that match the engine type and the ’99 Civic’s mounting geometry exactly. You need mounts that securely attach the engine, maintain correct alignment, and resist torsional forces under load. Match compatibility first — manifold, block, and subframe differences demand specific brackets. Use reinforced steel or polyurethane for durability; stock rubber often fails with higher power. Expect some cutting, drilling, or custom adapter plates when swapping unlike engines, so plan for professional help if you’re unsure. Upgraded mounts reduce engine movement, improve power transfer, and cut cabin vibration, but don’t ignore fitment checks: clearances for steering, exhaust, and suspension must be verified before final welding or bolting.
Wiring and Electronics
Because your Civic’s factory wiring wasn’t built for every engine, you’ll need a harness that’s compatible with both the donor motor and the car’s electrical system to guarantee sensors, ECU, and accessories all communicate correctly. Choose a high-quality harness with durable insulation to preserve conductivity and resist abrasion, heat, and chemical exposure. Prioritize tight shielding layers so signal transmission stays stable and interference won’t corrupt sensor data. Make sure the harness offers flexibility and strain relief to survive routing, bends, and vibration without cracking or breaking connections. Finally, prefer harnesses tested to meet or exceed OE specs; proven performance reduces troubleshooting time and prevents intermittent faults. Proper wiring integration is as important as physical fitment for a reliable swap.
Cooling and Exhaust
While high-output engines can transform your Civic’s performance, they also demand a cooling and exhaust setup that keeps temperatures in check and gases flowing efficiently; plan for a larger radiator, improved fans, and properly sized hoses, and be ready to design or fit headers and piping that clear suspension, steering, and chassis components without creating back pressure or heat soak. You’ll need upgraded cooling components—radiator, thermostat, fans, and possibly an oil cooler—because higher-output engines generate more heat. Route coolant hoses to avoid chafing and obstruction. For exhaust, match manifolds and piping to the engine’s flange and displacement; custom headers and mandrel-bent piping often deliver best flow and fitment. Consider weight, sound, emissions compliance, and guarantee oxygen sensor and catalytic converter placement meet legal requirements.
Frequently Asked Questions
Will My Stock Transmission Bolt up Without Modifications?
Yes, your stock transmission will bolt up in many swaps, but it depends on the donor engine, clutch actuation, and mount compatibility. You’ll need proper pilot bearing, flywheel match, and sometimes modified mounts or adapter brackets.
Do Swaps Affect Insurance or Vehicle Registration?
Yes — swaps can change insurance and registration. You’ll need to tell your insurer and might face higher premiums; DMV rules vary, requiring disclosure, inspections, VIN updates, or emissions compliance, so check local laws before swapping.
How Much Will a Professional Shop Typically Charge Labor-Wise?
Expect a pro shop to charge roughly $1,000–$4,000 for labor, depending on engine choice, complexity, and fabrication needs; shops with experience or required wiring/fabrication will charge toward the higher end of that range.
Can I Retain Power Steering and A/C With the New Engine?
Yes — you can keep power steering and A/C; they’ll happily ride along if you use compatible accessory brackets, pumps, and proper mounts, and if your wiring, belts, and hoses are adapted correctly during the swap.
What Emissions or Smog Requirements Apply in My State?
It depends on your state: you’ll need to check local DMV or air-quality board rules for engine swaps, emissions equipment, and smog certification; some states allow CARB-compliant swaps only, others need inspections and paperwork.
Conclusion
You’ve got great options for swapping into your 1999 Civic—pick based on goals, budget, and fitment needs. For example, one Civic owner swapped a K20 with a K-swap harness and A-Premium mounts, keeping stock suspension while gaining reliable 250+ hp for daily driving. Verify mounts, wiring, clutch lines, and weight distribution before you start, and plan for transmission and ECU compatibility so your build performs safely and as intended.
