Traxxas has released Piston/Sleeve for TRX 3.3 under category
This is actually the Piston and Sleeve the Traxxas TRX 3.3 devices. Features: ABC construction, (A)luminum piston mated to a (B)rass cylinder liner that's (C)hrome plated Includes: Piston and Sleeve and two Wrist Pin Clips the Traxxas TRX 3.3 machines