BMW M3 E46 S54B32 Pistons

Developed for mild to high tuning, these pistons are ideal for road or club race cars aiming for high mileage and street use. Designed by ZRP engineers and manufactured in Germany from 4032 (T6) high-silicon, low-expansion alloy, they allow for closer piston to bore clearance, producing a better seal and minimizing slapping noise during cold starts. This results in quiet operation and low oil consumption.

Product Features and Design

• Anti-detonation grooves for long wear life and performance
• Gas pressure accumulator groove in the 2nd ring land for longer wear life
• Horizontal slots in the pin bore for oil entry between the wrist-pin and pin-bore area
• Precision CNC machined ring grooves
• 4032-T6 high-silicon / low-expansion alloy
• Honed pin bores
• Clip cuts on the edge of the intake side
• Full round skirt design with bottom reinforcing band for high HP/boost applications
• Valve pockets designed for oversize valves and high lift camshafts
• Pistons designed to optimize squish for longer engine life and increased horsepower potential

Optional Coatings Offered Per Request

• Thermal barrier coating “Blast Off Bronze”
• Moly side-skirt and under-crown coating “Stealth Black”