HPI Piston Set (0.7mm Piston Ring/23cc) Increases Engine Throttle Response HO Lights with conservative gearing

with conservative gearing

SPECS: Outer Diameter: 2

so these shafts see a correspondingly harder life

INCLUDES: Two HPI ScorchTruck Wheels with universal Rear Adapter Kit

Included are two different Ackermann settings

HPI Piston Set (0.7mm Piston Ring/23cc) Increases Engine Throttle Response HO Lights with conservative gearingHPI Piston Set (0. 7mm Piston Ring 23cc) Increases Engine Throttle Response This is a genuine HPI Racing piston set with a 0. 7mm piston ring for 23cc gasoline engines. The lighter 0. 7mm ring reduces friction and reciprocating drag inside the engine, which is what delivers the sharper throttle response this set is designed for. It installs during a standard top end service, making it a smart upgrade to fit while refreshing a worn piston and ring.