192% higher Yield strength over OEM material

G22 / G23 430i

Place the cylinder head on top of the gasket and install the head bolts or studs in their correct positions

11121721547

specifically for the S14B20

BMW N55 / S55 4 Pin Crank Hub X6 xDrive40i 192% higher Yield strength overEliminate Crank Hub Failure on Your N55 S55 with RK Autowerks 4 Pin Solution Crank hub issues have plagued BMW N55 and S55 engines for over a decadecausing crankshaft spin, timing drift, and costly internal damage. RK Autowerks answers this problem with a precisely engineered fix: the RK 4 Pin Crank Hub. CNC machined in house at RKs Texas facility and made from heat treated 4130 Chromoly steel, this crank hub offers unmatched durability and precision.