the factory BMW bearings are made from tin-aluminum which are 5-times harder than a softer lead-copper bearing design

BMW M20B25 Applications:

Supertech's innovative approach also incorporates sophisticated software to control harmonics

fostering a seamless seal that doesn't just elevate performance but also thwarts any possibility of leaks

5150 bearings have demonstrated exceptional longevity and reliability

BMW M60B30 / M60B40 Forged Piston Set ARP Head Studs the factory BMW bearings areCP Carrillo represents the highest quality pistons on the market, engineered for maximum power and durability. Utilizing high strength, lightweight materials and advanced engineering, this BMW M60B30 M60B40 piston set features: Lightweight Design: CP Carrillo pistons are made from high strength, lightweight materials, such as forged aluminum alloy. Reduced piston weight contributes to improved engine responsiveness and acceleration. Advanced