This is the HPI Nitro Star .25 Cylinder, Piston, and Connecting Rod Set. This fits the Savage 25. This is a matched set that is installed inside the engine. This is a great way to restore the power to your HPI engine.
ABC Construction (Aluminum, Brass, Chrome)
Four Intake Ports, One Exhaust Port
One Connecting Rod
Assembly into Engine.
Height of Cylinder: 1.2" (30mm)
Inner Diameter of Cylinder: .70" (17mm)
Outer Diameter of Cylinder: .80" (20mm)
Height of Piston Head: .66" (16mm)
Diameter of Piston: .70" (17mm)