Mammoth 4X4 Logo Center Cap Durable Black Finish Superior Styling Designed For Mammoth D Window And 8-Hole Wheels Only Universal Application Superior Style. Upgrade your new steel wheels with Mammoth 4x4's solid black center cap for a sleek look. These caps feature Mammoth 4x4's signature logo and will enhance the look of your rims, to make your rig stands apart from the crowd. Construction. Durable and trail ready, these caps are constructed of high quality steel for the most in strength and reliability. They mount easily to Mammoth 4x4 8 and D Window steel wheels, and feature a universal application if you're looking to represent your Mammoth 4x4 suspension lift. Application. These Mammoth 4x4 Black Center Caps for Steel Wheels are universal and designed to fit on vehicles that is equipped Mammoth 4x4's D Window and 8-Hole Wheels.