O.S. Speed 12 TZ Spec II Precision 1/10 Racing Engine  [OS-11385]

High-RPM O.S. Speed 12 TZ Spec II for 1/10 Cars

Engineered for competitive 1/10 model racing, the O.S. Speed 12 TZ Spec II combines tight engineering with race-focused cooling. It is aimed at hobbyists who demand consistent power delivery and compliance with IFMAR standards.

Precision Build and Thermal Management

The O.S. Speed 12 TZ Spec II uses a silicon-filled crankshaft to optimise balance and cut vibration, helping maintain smooth operation at high revs. Its nine-fin aluminium cooling head and two-piece turbo cylinder head with a magnesium outer shell work together to keep temperatures in check during sustained runs.

What Is Supplied and Key Components

Included are the P7 glow plug and the 11HBS Slide Valve Carburetor, which provide accurate throttle response for on-road set ups. The box also contains a decal sheet, an instruction manual, a 5.5mm carb reducer and a rubber exhaust sealing ring for straightforward installation.

For racers who tune regularly, the O.S. Speed 12 TZ Spec II delivers compact, controllable power for 1/10 classes. This performance-oriented unit is sold without warranty, so it is best for those confident with engine setup and servicing.