The O.S.SPEED R2106 Combo Set 2 (OS-1EY03) is a no-compromise high-end package for 1/8 on-road nitro racing. It combines the factory-tuned R2106 3.49cc (.21) competition engine with the TR03 EFRA2196 tuned pipe and MR05 manifold, delivering strong performance, crisp throttle response and a wide usable powerband.

The R2106 features a new 9-port cylinder liner with redesigned ports for increased output. For a strong feel from low RPM, it adopts the R21 Euro II crankshaft and a proven ceramic ball bearing, while a reinforced connecting rod improves durability under demanding on-road racing conditions.

The combo also includes key accessories such as the RP7 turbo glow plug, seals and collet, making it an excellent choice for racers looking for a complete performance-oriented setup.

Key Features

• Factory-tuned 1/8 on-road competition engine: O.S.SPEED R2106 (.21 / 3.49cc)
• TR03 EFRA2196 tuned pipe for race-focused power delivery
• MR05 exhaust manifold for optimized fit and tuning
• 9-port cylinder liner with redesigned ports
• R21 Euro II crankshaft + ceramic ball bearing
• Practical RPM range: 4,000 – 45,000 rpm
• Output: 2.8 hp @ 35,000 rpm

Box Contents (Combo Set)

• O.S.SPEED R2106 3.49cc on-road competition engine
• TR03 EFRA2196 tuned pipe
• MR05 manifold
• RP7 turbo glow plug
• Exhaust seal ring
• Flywheel collet
• Dust cap set (16mm / 18mm)

Required to Run

• 1/8 on-road chassis with compatible engine mount
• Clutch, flywheel and clutch bell (chassis dependent)
• Nitro fuel and fueling accessories
• Starter box / starting system
• Air filter (track/regulation dependent)
• Glow igniter and basic engine-start accessories