Improve crankcase ventilation with the Spectre 4300 push-in valve cover breather cap. This automotive breather features a chrome-plated steel housing and an internal baffle designed to help reduce oil splash while supporting consistent ventilation. Its push-in design is intended for compatible valve covers with breather openings ranging from 3/4 inch to 1-1/4 inches, making it a practical choice for a variety of performance and replacement applications.
For 1-1/4-inch valve cover openings, Spectre recommends pairing this breather with the 5339 or 5333 grommet kit for proper installation. The triple chrome-plated steel construction provides a durable finish and a clean, traditional appearance under the hood. Before installation, confirm the valve cover opening size and grommet requirements to help ensure a secure fit and reliable operation.

• Ventilation: Designed to provide effective crankcase ventilation.


• Construction: Made with triple chrome-plated steel for durability and a polished appearance.


• Internal baffle: Helps limit oil splash entering the breather during operation.


• Fitment: Designed for compatible 3/4-inch to 1-1/4-inch valve cover breather openings.


• Installation: Push-in style for use with the appropriate valve cover grommet.

This Spectre 4300 breather cap is not approved for use on pollution-controlled highway vehicles in California. It is legal in California only for racing vehicles that may never be used, registered, or licensed for highway use. Review Spectre Performance emissions information and applicable local regulations to confirm suitability for your vehicle before purchase or installation. This product may also carry a California Proposition 65 warning.

Features:

• Ventilation: Designed to provide effective crankcase ventilation.


• Construction: Triple chrome-plated steel housing for durability and a polished appearance.


• Internal baffle: Helps reduce oil splash and support cleaner breather operation.


• Fitment: Designed for compatible 3/4-inch to 1-1/4-inch valve cover openings.


• Installation: Push-in design for use with the appropriate valve cover grommet.


• Emissions compliance: Intended for racing vehicles only where required by California regulations.