Cover up the lackluster plastic caps that come from the factory with a cap machined from solid aluminum and bright anodized your favorite color.  The units install easily within minutes and simple hand tools.

Current known fitment: (G20) M330i/M340ix, (G42) M240i, (G22/G23) M440, and (G29) Z4.

Anodized parts can potentially fade over time due to engine bay heat.