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

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

• 90° 3/8" hose barb routes to a catch can or air/oil separator

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

• Ball-milled polished top adds a machined, custom-shop appearance

This billet aluminum breather cap is designed to help relieve internal crankcase pressure, reduce blow-by, and add flexibility for routing hose to a catch can, air/oil separator, or other custom ventilation setup. 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.

A 90° hose barb outlet (3/8") extends from the round, ball-milled top, giving it a custom-machined, show-quality appearance while supporting hose-routed ventilation. Confirm your hose's inside diameter matches the 3/8" barb before connecting, and verify your valve cover's opening style, neck diameter, and grommet size match this cap's 1" push-in fitment before ordering.

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 where routed hose ventilation (to a catch can or air/oil separator) is needed. 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. Confirm hose inside diameter matches the 3/8" barb before connecting.

What size hose does this breather cap's barb fit?

3/8" inside diameter. Confirm your hose ID matches before connecting.

What angle is the hose barb outlet?

90°, extending from the top of the cap for routed hose applications.

What's the difference between this and the smooth (plain top) tube version?
This kit has a ball-milled top for a machined, custom look. TSP's smooth push-in breather cap with tube (SKU 53R8497P) has a plain top instead. Both share the same 90° 3/8" hose barb, 1" neck size, polished finish, and 2-1/2" x 2-1/2" dimensions.

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.

Can I connect this to a catch can?
Yes — the 90° 3/8" hose barb is designed for routing to a catch can, air/oil separator, or similar custom ventilation setup, provided your hose ID matches the 3/8" barb.