Nitto RB25 Standard Stroke - 87.0mm (+.040") +18cc Dome * HD Forging PistonsNIT-CP-RB2540

Our whole Nitto piston range is manufactured by CP Carrillo, based in California, USA. CP Carrillo is a subsidiary of Pankl Racing, an Austrian automotive components manufacturer that supplies components for the highest levels of motorsport, including Formula 1, Le Mans Prototypes, and Moto GP, to name a few. This means that every Nitto piston benefits from world-leading technologies and processes that are passed from Pankl onto CP.

Nitto pistons are made to our own specifications in conjunction with CP Carrillo and are cut from CP’s low silicon content 2618 aluminium and Turbo HD forging (where applicable). Additionally, our pistons are equipped with a PVD-coated ring set that delivers the best bore sealing capabilities for boosted applications, eliminating virtually all blow-by while reducing friction against the cylinder wall. As part of the piston kit, CP’s upgraded 9310 material wrist pins are standard across our range. The pins are 100% Rockwell tested, case hardened, and cryogenically treated in order to enhance their material grain structure and overall strength.

All Nitto pistons also come standard with additional features such as forced double pin oiling, which is essential to keep the wrist pin well lubricated. Anti-detonation grooves are also included. Anti-detonation grooves reduce piston-to-wall contact under high load and also protect the top ring by disrupting the detonation waves. Finally, another feature that is standard across our piston range is the accumulator grooves. Accumulator grooves accumulate residual gases from combustion, which alleviate top ring flutter and premature second ring wear, improving ring seal.

All of these features combine to create the world-beating pistons that boast multiple world records across multiple categories in Drag Racing and Circuit Racing.