or street builds

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This coating is applied to the piston skirt (the side of the piston that contacts the cylinder wall) to reduce friction during operation

The custom designed stainless steel electrical studs easily handle the high current demand that compact multi-pin bulkhead connectors lack

BMW S63 Billet Intake Manifolds for F1X M5 M6 640ix or street buildsThe RK Autowerks S63 Billet Port Injection Intake Manifold for F1X M5 and M6 models is engineered for high performance BMW builds that require integrated port injection capability. Machined in house on 4 axis CNC mill and developed using advanced 3D laser scanning and rapid prototyping, this billet manifold delivers superior fitment, durability, and performance potential for turbocharged S63 applications. Constructed from high grade billet aluminum,