Traxxas 4030 Cylinder Sleeve Piston 4-Tec Vee Boats -All Rustler Nitro Sport

This is the Traxxas (TRA) #4030 replacement piston and sleeve for the TRX Pro 15 engines.

ABC (Aluminum piston with a Brass sleeve or liner that is Chrome plated).Matched set with oil ring

1 Piston
1 Sleeve(liner)

There is a notch on the top of the sleeve (liner).The piston and sleeve is usually replaced after the engine performance weakens and compression is decreased after much use