Dress up your 3.8L engine bay with this attractive billet oil cap. Our engine caps & handles are machined from 6061-T6 billet aluminum, and feature a brushed & textured surface with clear anodized finish. All caps, with exception of our radiator cap cover and TJ power steering cap cover, are complete replacement caps. The radiator cap cover & power steering cap cover fit over your existing radiator and power steerings caps. Together with our battery hold down clamp, these caps will give your engine a complete custom look.