Mahle Motorsport Forged Piston Set (Coated) BMW S55 84mm Bore 10.2:1 CR (F80 / F82 / F87)

BMW S55 Mahle Motorsports Forged Piston Set (2618 Alloy)

Reinforce the rotating assembly of your S55 engine with Mahle Motorsports Forged Pistons. While the factory BMW cast aluminium pistons are sufficient for stock power levels, they often become the "weak link" in high-performance turbocharged applications. Cast components are inherently susceptible to heat-soak and brittleness under the extreme combustion forces found in tuned M2 Competition, M3, and M4 builds.

Forged from high-performance 2618 alloy, these pistons are specifically designed for "heavy-duty" turbo use. This low-silicon material is more ductile than standard alloys, allowing the piston to better absorb detonation and combustion shocks rather than failing catastrophically. To further enhance durability, Mahle has integrated hard-anodized ring lands to resist wear and a ceramic-based thermal coating on the crown to reduce heat transfer into the piston body.

Each piston is finished with a phosphate dry-film lubricant and Mahle’s signature Grafal skirt coating, which significantly reduces friction, drag, and cylinder bore scuffing. This set maintains factory bore and compression specifications, making it the ultimate "drop-in" upgrade for enthusiasts looking to safely increase boost levels. Contact us at sales@chicaneaustralia.com.au for expert S55 engine building advice.