Retainer: RET-H70/T1

These rod bearings feature Calico coatings that significantly reduce friction

ensuring long-term reliability during demanding drives

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and potential for high horsepower output

CP Forged Piston Set, BMW / Rolls-Royce N74R, Pro-Xtreme, Sleeved Wrist Pin:Heavy Duty Retainer: RET-H70/T1Please note that these pistons are only suitable for use in engine blocks that have been machined to have iron cylinder sleeves. Recommended piston to wall clearance is ~0. 0035 0. 0045 in The 5150 AutoSport Pro Xtreme Forged Pistons, made by CP Carrillo, are designed to handle extreme horsepower and high RPM applications for BMW and Rolls Royce N74R engines. Constructed from high strength, aircraft grade steel, these pistons are engineered to