NRW S58 Billet Valve Cover
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Engineered for extreme performance. Machined from a single block of 6061 billet aluminum. Proven at 1,600+ WHP. Made in the USA.
After more than a year of engineering, machining, and real-world testing, the NRW Design S58 Billet Valve Cover is a purpose-built solution for S58 owners who demand greater strength, durability, crankcase management, and craftsmanship.
The factory S58 valve cover is plastic and incorporates BMW's factory PCV system. Age, repeated heat cycling, increased power, and elevated crankcase demands can expose the limits of components designed around OEM operating conditions. Rather than recreating the factory cover in another material, NRW engineered this cover around the requirements of high-horsepower S58 applications.
Machined from a Single Block of 6061 Billet Aluminum
Each cover is precision CNC-machined from solid 6061 billet, giving a far more rigid structure with excellent dimensional stability and resistance to heat cycling, plus a precision-machined sealing surface for consistent gasket compression. No cast construction. No multi-piece main housing.
Purpose-Built Crankcase Management
The design eliminates the factory PCV system and uses an external catch can configuration. Two integrated 12-ORB ports with -12AN swivel fittings provide large, robust connections for routing crankcase ventilation to a catch can, which becomes increasingly important as horsepower, cylinder pressure, and blow-by increase.
Built for Performance
- Increased structural rigidity over the factory plastic construction
- Improved long-term resistance to heat cycling and material degradation
- Precision-machined gasket sealing surfaces
- Purpose-built external crankcase ventilation, internally baffled
- Robust billet-machined ORB connections
- Improved durability for demanding high-performance applications
- Greater flexibility when configuring high-horsepower crankcase ventilation
- Premium fit, finish, and craftsmanship
Proven at 1,600+ WHP
Tested on S58 applications producing upwards of 1,600 WHP, including record-setting S58 builds, with the valve cover and ventilation configuration managing crankcase pressure without related check-engine-light issues.
Included
- 1 × NRW Design S58 Billet Valve Cover (raw billet finish)
- 2 × 12-ORB to -12AN Swivel Fittings
Catch can system, hoses, additional fittings, and plumbing are sold separately.
Designed, engineered, and machined in-house by NRW Design. Made in the USA.
