5150 Autosport Pro-Xtreme Forged Piston Set for BMW S58

Overview

5150 Autosport Pro-Xtreme Forged Pistons for BMW S58 engines, manufactured in collaboration with CP-Carrillo. Rated for up to 2000 HP and 9500 RPM, these HD forged aluminum pistons are engineered for high-boost turbo builds, track racing, and street applications. Direct replacement requiring no boring or honing; includes pistons, PVD rings, pins, locks, and spec sheet. Available in 84 mm and 84.25 mm diameters with 9.3:1 and 10.5:1 compression ratios. Standard wrist pins support up to 850 HP; Heavy Duty pins required for higher outputs.

Installation summary

Installing the 5150 Autosport Pro-Xtreme Forged Piston Set in your BMW S58 engine requires expert-level mechanical skills and a completely torn-down, meticulously cleaned engine block. Preparation involves verifying your cylinder bore measurements against the included specification sheet, checking ring gaps, and selecting the appropriate Heavy Duty wrist pins if you plan to exceed the standard 850 horsepower limit. The most critical step during assembly is ensuring precise ring gap filing and correct piston-to-wall clearance verification to prevent catastrophic failure under high-boost conditions. Due to the extreme precision and comprehensive engine teardown required for this internal reciprocating upgrade, professional installation by an experienced BMW engine builder is strongly recommended.

AI-generated overview — always verify against the official install instructions.