Aluminum Breather Cap, Push-In with Tube Oval Finned - Black

• 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 openings — grommet included

• Finned oval black top adds classic hot rod styling

This billet aluminum breather cap is designed to help relieve internal crankcase pressure and reduce the risk of oil leaks and blow-by, while adding 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 opening, with a grommet included for the install.

A 90° hose barb outlet (3/8") extends from the finned oval top, finished in black aluminum for a classic hot rod look. At 4" x 2-3/8" with a 2-3/4" height, this cap is larger than TSP's round breather caps — verify clearance around your valve cover before ordering, and confirm your hose's inside diameter matches the 3/8" barb before connecting.

Applications
Fits universal push-in valve cover breather 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 and clearance for the oval footprint before ordering.

Installation
Push-in fitment with grommet included. Verify neck diameter (1"), grommet size, and clearance for the 4" x 2-3/8" oval footprint 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.

Does this come with a grommet?
Yes — a grommet is included with this tube version. (Note: TSP's non-tube oval finned breather cap, SKU 53R8486BK, does not include one.)

What are the dimensions of this breather cap?
4" length x 2-3/8" width (oval footprint) x 2-3/4" height — larger than TSP's round breather caps, so check valve cover clearance before ordering.

What's the difference between this and the version without a tube?
This kit includes a 90° 3/8" hose barb for routing to a catch can or air/oil separator, plus a grommet. TSP's non-tube oval finned cap (SKU 53R8486BK) has no barb and does not include a grommet. Both share the same finned oval top, black finish, and overall footprint.

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.