20-0504-V Notes:

CP-Carrillo pistons are the best choice for any M10 engine and application

TIG-welded construction

and O-rings for installation

(12) Nitride Intake valves

BMW S52 Piston Set by Arias Pro Extreme 20-0504-V Notes:Arias Forged Pistons for BMW S52 86. 5mm Bore, 9: 1 Compression Mixing Power & Affordability Arias Pistons, backed by 55 years of high performance piston engineering experience, now offers a piston set for the BMW S52 platform. Manufactured from Arias forgings in the CP Carrillo facility in California, USA, these 86. 5mm bore, 9: 1 compression forged pistons offer race proven durability and precision machining at a competitive price. Arias Forged