Aluminum Breather Cap, Push-In Ball-Milled - Polished

• Push-in billet aluminum breather relieves crankcase pressure & blow-by

• Ball-milled round top with polished finish adds a machined, custom look

• Fits 1" push-in valve cover breather/PCV openings — grommet included

• Simple upgrade for restorations, maintenance, or custom valve cover setups

This billet aluminum breather cap is designed to help relieve internal crankcase pressure, reduce blow-by, and support cleaner engine operation. The push-in design fits a 1" neck size and installs into a compatible valve cover breather or PCV opening, with a grommet included for the install.

The round, ball-milled top with a polished finish gives it a custom-machined, show-quality look in the engine bay — a straightforward upgrade for maintenance, restoration, or custom valve cover setups. Before ordering, confirm your valve cover's opening style, neck diameter, and grommet size match this cap's 1" push-in fitment.

Applications
Fits universal push-in valve cover breather/PCV openings with a 1" neck size. Commonly used with aftermarket valve covers and engine dress-up systems. Not matched to a specific engine or vehicle — verify your valve cover's opening style before ordering.

Installation
Push-in fitment with grommet included. Verify neck diameter (1"), grommet size, and valve cover opening style before installing.

What size valve cover opening does this breather fit?
A 1" push-in neck size. Confirm your valve cover's opening diameter and grommet size match before ordering.

Does this come with a grommet?
Yes — a grommet is included for the push-in installation.

What's the difference between this and the smooth (plain top) version?
This kit has a ball-milled top for a machined, custom look. TSP's smooth push-in breather cap (SKU 53R8499P) has a plain top instead. Both share the same 1" neck size, polished finish, and 2-1/2" x 2-1/2" dimensions.

What are the dimensions of this breather cap?
2-1/2" diameter and 2-1/2" height.

Will this fit any valve cover?
It fits valve covers with a compatible 1" push-in breather/PCV opening. It's commonly used with aftermarket valve covers and engine dress-up kits, but always verify your specific valve cover's opening style and neck diameter first.