BMW E9x M3 S65 Billet Valve Covers

Why Billet > Magnesium & Cast

While cast aluminum is widely used and generally effective, its manufacturing process—pouring molten metal into molds—introduces porosity, inconsistent grain structure, and potential warping. These factors reduce structural integrity and can compromise sealing surfaces over time. In contrast, EAE valve covers are CNC-machined from solid 6061-T6 billet aluminum. This results in a finer, uniform grain structure, superior tensile strength, and exceptional dimensional stability, making it the optimal choice for applications where heat cycling, sealing integrity, and mechanical reliability are critical.

When it comes to valve covers, this process delivers uniform strength, precise tolerances, and exceptional thermal stability—significantly outperforming cast or OEM magnesium components. Built to Last. Not Just to Look Good

Our Preferred Finish: Hard Anodizing

Hard anodizing is now our standard finish for all EAE billet valve covers. It delivers the highest level of durability, heat resistance, and long-term reliability while maintaining perfect machining tolerances.

Why We Choose Hard Anodizing

• No Thickness Buildup: Maintains exact gasket surfaces and precision-machined tolerances for flawless sealing.
• Extreme Durability: Forms a hardened, ceramic-like layer that resists heat, oil, solvents, and abrasion.
• Motorsport-Grade Finish: Clean, uniform, and professional — won’t peel, chip, or degrade over time.

Custom Coating Options 

If you prefer a custom look, we can finish your valve cover in Cerakote or powder coat at no additional charge. Just choose your preferred coating or send us a color reference during checkout.

Why We Made These Valve Covers 

A message from EAE Motorsports

This project started as a simple idea I posted a few years ago—just drawings and a dream, with no shop or resources to make it real. Along the way, I hit roadblocks, lost money to unreliable vendors, and almost gave up more than once. But the passion never left. Eventually, I found a small machine shop in Maryland whose work was spot-on. When the first set was ready, I flew the owner out, and we installed them in my garage—everything fit like a glove.

Now, after all the ups and downs, these covers are finally in production. Whether I sell one or a hundred, just having them finished and on my car is a win. If you’re working on something of your own, don’t stop. The process is the reward.

Go behind the scenes from CAD to final prototype and see how each cover is engineered, machined, and brought to life. Watch Here.