The Spectre Performance 5339 PCV Breather Grommet offers a compact, durable rubber seal for 1-1/4 inch filler-breather holes, rated highly by users for fit and leak control. Key specs: 1-1/4″ fit, quick ~10-minute install, reduces crankcase blow-by. How well does it match OEM tolerances? Mostly snug, direct-replacement performance. Practical notes: check hole diameter, valve cover thickness, and material wear before purchase — more specifics follow.
Key Takeaways
- Direct OEM-style replacement grommet for 1-1/4″ valve-cover filler-breather holes, sold as a two-piece set.
- Made from durable rubber with two size options (1-1/4″ x 3/4″ and 1-1/4″ x 1″) for varied fitment.
- Users report easy, ~10-minute installation with snug seating that reduces crankcase blow-by and hose slippage.
- Highly rated by customers (average 4.6/5 from ~1,811 reviews) for affordability and reliable performance.
- Limited formal warranty; covered by Amazon’s 30-day return policy—inspect before final sealing.
Product Features and Specifications
When evaluating the Spectre Performance 5339 PCV breather grommet, a reader will find a compact, purpose-built component that fits valve covers with 1-1/4 inch filler-breather holes and serves as a direct OEM replacement.
The review covers grommet compatibility and rubber durability in practical terms. What are the specs?
The review covers grommet compatibility and rubber durability—specs include two sizes, 1.25″ barb, OEM-fit rubber construction.
Two grommets included: 1-1/4″ x 3/4″ and 1-1/4″ x 1″; inlet/outlet barb size 1.25″.
Material: rubber, 4.1 x 0.8 x 6 inches overall packing.
Is fit reliable? Engineered to OE dimensions, 1.44 oz each, model SPE-5339, meets common valve-cover requirements.
Fit, Performance, and Installation Experience
Following the specifications and OEM-style design noted above, the focus shifts to real-world fit, on-engine performance, and the hands-on installation experience with the Spectre 5339 grommets.
The 1-1/4 inch inlet/outlet, supplied as 3/4 inch and 1 inch depths, fits typical valve covers; snug rubber seating prevents leaks.
Performance benefits include reliable sealing, reduced crankcase blow-by seepage, and stable hose attachment.
Installation tips: clean the bore, lubricate with silicone, press evenly.
Q: How long? A: Ten minutes per grommet for experienced hands.
Practical note: verify port spacing, clear nearby wiring, test for vacuum leaks after startup.
Value, Warranty, and Customer Feedback
Value assessment of the Spectre 5339 centers on its low cost, OEM-style fit, and long track record among users, making it a practical choice for routine valve-cover service and PCV setups.
Value lies in low cost, OEM-style fit and proven reliability—ideal for routine valve-cover and PCV work.
Readers get two rubber grommets, sizes 1-1/4″ x 3/4″ and 1-1/4″ x 1″, lightweight at 1.44 ounces, OE-spec fit.
Warranty details: Amazon’s voluntary 30-day return applies; check seller policies for longer coverage.
Q: Is it worth buying?
A: Yes for inexpensive, direct-replacement needs.
Pros: affordable, 4.6/5 from 1,811 ratings, easy install.
Cons: limited formal manufacturer warranty, inspect fit before sealing.
Frequently Asked Questions
Will This Grommet Resist Oil Swelling and Hardening Over Time?
Yes, it offers good oil resistance; the rubber formulation is engineered for longevity. Durability testing and OE-spec manufacturing suggest reduced swelling and hardening over time, though extreme conditions may still accelerate wear.
Is It Compatible With Aftermarket Valve Covers of Non-Standard Thickness?
By chance, yes: Aftermarket compatibility often depends on valve cover thickness; the grommet fits standard 1-1/4-inch holes but may not seal on unusually thick or thin covers, so measurement and test-fitting are advised beforehand.
Can It Be Used With Electric Crankcase Ventilation Systems?
Yes. It can work with electric crankcase ventilation systems when physical fit is correct; electric ventilation compatibility depends on port sizing and sealing, and proper crankcase system integration requires matching barb sizes and secure hose connections for reliable operation.
Does the Rubber Tolerate High Under-Hood Temperatures Consistently?
Yes; like a heat-forged seal weathering engine summers, the rubber shows high temperature resilience and decent rubber longevity under typical under-hood conditions, though extremes and age can reduce performance, warranting periodic inspection and replacement.
Are Replacement Grommets Sold Individually or Only in Pairs?
They are sold in pairs; the listing supplies two grommets, so the buyer should plan for individual vs pairs considerations during grommet installation, ensuring both valve cover openings receive matching replacements for proper fitment.
Conclusion
Like a sturdy cork sealing a busy bottle, the Spectre Performance 5339 PCV breather grommet performs a simple, essential task reliably. It fits 1-1/4 inch filler-breather holes, installs in about ten minutes, and reduces crankcase blow-by with a snug rubber seal. Is it worth buying? Yes for routine maintenance: compact, durable, economical. Consider compatibility with valve cover dimensions and inspect the seal after initial use for best results.
