NRW-Design BMW S65 Billet Block Off Cap

The NRW Design S65 Billet Block-Off Cap is a premium CNC-machined replacement for the stock plastic accessory block-off caps found on the BMW E9X M3’s S65 V8 engine. Crafted from solid billet aluminum and finished with precision, this block-off cap eliminates the weak, brittle OEM plastic parts that are prone to cracking and leaking over time. Perfect for performance builds, high-temperature environments, or engines with upgraded components, this billet cap delivers improved durability and a clean, engineered visual upgrade for your S65 engine bay. Features and Benefits CNC-machined billet aluminum for superior strength and rigidity Direct replacement for factory plastic S65 block-off caps Cleaner, stronger, and more durable than OEM components Precision fit designed for S65 engine accessory ports Engine bay upgrade with motorsport-inspired aesthetics Ideal for performance, racing, or high-stress builds