Spectre 4300 chrome oil breather cap installed on valve cover
Close-up of internal baffle and push-in design
Triple-chrome plated housing detail
Click to zoom in

Spectre Oil Breather Cap 3/4in. (Push-In)

Spectre
SPE4300
089601430003
Engine Breather Filters
20+ Units In Stock - Ships Next Business Day
$ 17.99
$ 17.99

SKU: 4300   |   UPC: 089601430003

Spectre Oil Breather Cap 3/4in. (Push-In)

The Spectre Oil Breather Cap 3/4in. (Push-In) stands as the essential valve cover accessory for classic and performance engines. It features a chrome-plated steel housing with an internal baffle that prevents oil splash while delivering superior crankcase ventilation that outperforms basic grommet caps or twist-on breathers by maintaining consistent airflow without leaks or oil misting during high-RPM operation. Designed for universal fitment on valve covers with 3/4-inch to 1-1/4-inch breather holes, this push-in cap integrates seamlessly with stock or aftermarket setups to reduce pressure buildup and extend engine life. This ensures builders and daily drivers experience cleaner engine bays and reliable performance compared to exposed PCV valves or undersized filters. Crafted from durable triple-chrome plated steel for corrosion resistance and easy cleaning, it provides a polished look that complements show cars or hot rods better than plastic alternatives. It also supports emissions compliance where applicable for a straightforward upgrade that enhances overall engine breathing across street, strip, or track conditions.

Key Features

  • Chrome-Plated Steel Housing – Triple-plated for rust resistance and high-shine finish
  • Internal Baffle Design – Blocks oil splash while allowing unrestricted air flow
  • Push-In Installation – Fits 3/4-inch to 1-1/4-inch holes without tools
  • Superior Ventilation – Reduces crankcase pressure for better ring seal and power
  • Universal Compatibility – Works with small-block Chevy, Ford, Mopar, and imports
  • Easy Maintenance – Removable foam filter for cleaning or replacement
  • USA-Made Durability – Built to last with precision stamping

Product Notes

  • Universal fit for valve covers with 3/4-inch to 1-1/4-inch breather holes
  • Recommend grommet kit 5333 or 5339 for 1-1/4-inch holes
  • California legal for racing vehicles only, check CARB status
  • Replaceable foam filter available as 5331

Warranty – Spectre limited lifetime warranty against defects

Installation Notes

  • Clean breather hole on valve cover, insert cap by hand
  • For larger holes, use included or optional grommet
  • Secure by pushing firmly until flush, no tools needed
  • Test for leaks at idle, adjust if necessary
  • Tools required – None, est. time: 2-5 min

This Part Fits

Application Examples Notes
Valve Covers Small Block Chevy, Ford Windsor, Mopar LA 3/4-inch to 1-1/4-inch holes
Imports Honda B/D Series, Nissan SR20 Universal breather fit
Custom Builds Any Engine Aftermarket valve covers

What's Included in the Purchase

  • 1 x Chrome Push-In Oil Breather Cap 3/4in.
  • Foam Filter Insert
  • Installation Guide (PDF)

Part Weight: 0.3 lbs | Shipping Box Dimensions: 6 in × 4 in × 2 in

Why Choose Spectre Oil Breather Cap?

  • Engineered for universal valve cover use with proven splash control
  • Triple-chrome finish for show-quality appearance
  • USA-made with reliable ventilation for performance engines

Frequently Asked Questions

  • Q: Does it fit 1-1/4-inch holes?
    A: Yes with grommet kit 5333 or 5339
  • Q: Is it CARB legal?
    A: For racing only in California, check spectreperformance.com
  • Q: Replaceable filter?
    A: Yes, foam insert SKU 5331 available

Shipping & Handling

  • Method – Ground shipping, expedited available
  • Availability – In stock, ships within 1-2 business days
  • Packaging – Protective polybag to prevent scratches

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