Combo OS Speed R21GT engine Competition

Combo of the O.S. Speed R21GT engine with the T-2060SC + MB01-70 (M2003SC) exhaust system for the 1/8th GT on-road classes.

Designed with the forthcoming 1/8th GT IFMAR World Championship in mind, the engine builds on the proven R2101 crankcase which was refined as was the 5+3 ports liner and piston to meet current IFMAR rules.

Tech specifications:
- Displacement: 3.49 cc
- Bore: 16.08mm
- Stroke: 17.20mm
- Intake ports: 5-port
- Exhaust port: 3-port