To retain factory functionality

Clutch Masters' focus on machining the strongest cover possible while maintaining minimal weight has led them to a design that virtually eliminates any flex

Performance without Compromise

The one-piece lower control arm design allows for easy caster adjustment

or high-lift camshafts

BMW S58 Head Stud Thread Insert Kit S65B47 To retain factory functionalityThe BMW S58 Head Stud Thread Insert Kit provides your machine shop everything needed to repair or upgrade the engine block threads on BMW S58 engines. Designed for precision and durability, this kit allows you to restore damaged threads or prepare the block for oversized head studs for improved clamping strength. Please note, this product does NOT include head studs. Head Studs are available for purchase here. Each BMW S58 Head Stud Thread Insert Kit