View Spec →Oil Filler Cap
The smallest upgrade you'll touch every oil change — and the one that feels like the whole car.
A1-ENG-OF · A1 GradedSynthetic media, a real bypass valve, and a nut welded on for tool-off removal.
A1-ENG-OFSerialized & inspected · Ships in 1–2 business days
A deep-pleat synthetic media element that flows more oil at cold start while filtering finer than cellulose, backed by a silicone anti-drainback valve that keeps the galleries primed so the engine never turns dry. A hardened base plate and a welded 1-inch nut mean it comes off with a wrench, not a knuckle.
Threaded by application — select vehicle at checkout
View Spec →The smallest upgrade you'll touch every oil change — and the one that feels like the whole car.
View Spec →Catches the metal your filter can't. What you see at the next change tells you everything.
View Spec →Keeps blow-by oil out of your intake — so the top end stays as clean as the day it was built.
View Spec →One block of forged aluminum, six pistons, zero flex. The part every other part is measured against.