To complement the valve springs

or G87 to new performance heights

these springs enhance valve control and durability

and S14B27 engines found in the E30 M3

guaranteeing optimal balance

5150 AutoSport High Performance Main Bearing Set, BMW N55 S50 Turbo To complement the valve springsDesigned for high performance engine builds, the 5150 High Performance Coated Main Bearing Set for BMW N55 engines is designed to meet the rigorous demands of enthusiasts and racers alike. These bearings feature advanced Calico coatings that significantly reduce friction, enabling engines to generate increased power while minimizing the risk of "spinning" under extreme stress. What sets these bearings apart from OEM options is their exceptional