Oil Caps

GrimmSpeed 13+ Subaru BRZ 22+ WRX Engine Bay Dress-Up Caps

Perrin 15-22 Subaru WRX / 19-24 Subaru Ascent Cam Solenoid Cover - Pink

HKS Toyota Type 1 Oil Filler Cap

EPI Oil Cap

EPI Oil Cap

Sinister Diesel 11+ Ford Powerstroke 6.7L/ 2017+ Chevy Duramax Oil Fill Cap - Gray

Sinister Diesel Intake Resonator Cover Plate for 2011-2016 GM Duramax 6.6L LML (Gray).

It's easy to take a power steering cap for granted until yours is defective. With a faulty cap, you're allowing fluid to leak out or, even worse, allowing contamination into your power steering fluid reservoir. With a Sinister Diesel Power Steering Cap,...

From the factory, the 6.0L PowerStroke had a plastic lower fuel filter cap, which becomes weak and brittle over time. A cracked or broken filter cap can lead to fuel leaks or extra costs associated with repairs. This Ford 6.0 fuel filter cap has a tough,...

Brakes are easy to overlook in diesel performance until yours aren't working properly. OEM plastic factory brake master cylinder caps are prone to growing brittle and cracking over time. This can lead to losing fluid or allowing moisture in the air to...

Sinister Diesel 03-07 Ford Powerstroke 6.0L Fuel Filter Cap - Gray

This new Sinister Diesel Oil Fill Cap functions like a factory cap, but features custom Sinister Diesel looks. The cap fits 1999-2010 Powerstroke engines and 2007.5-2019 Dodge/Ram Cummins engines. It is made from CNC machined, solid billet T6-6061...

Dress up the engine bay in your truck and add some nice durability with this 08-10 Powerstroke billet cap kit from Sinister Diesel. The kit comes with replacement aluminum Oil Filler Cap, Fuel Filter Cap, and Oil Filter Cap. Each one has been designed as...

Add some durability and style to your truck using these Sinister Diesel 03-07 Powerstroke billet cap! Unlike the OEM oil and filter caps, these won't crack from overtightening or just the passing of time. All three caps are gray, adding a nice splash of...

Sinister Diesel 2017+ Ford Powerstroke Windshield Washer Cap