Track-Tuned O.S. Engine OS-1AS00 Speed 21XZ-GT Nitro Powerplant  [OS-1AS00]

Raw Track Power with O.S. Speed 21XZ-GT

For club racers and dedicated hobbyists, the O.S. Engine OS-1AS00 Speed 21XZ-GT brings dependable nitro power and finely tuned response to 1/10 scale cars. Its engineering focuses on predictable performance under race conditions.

Built to Precise Standards

The O.S. Speed 21XZ-GT is manufactured with close tolerances so moving parts run smoothly and reliably. Attention to detail in the combustion chamber and porting helps deliver steady power and makes setup and tuning more repeatable. Expect efficient cooling and fuel use that support longer runs between pit stops.

On-Track Performance and Driveability

This engine balances torque and top end so you get usable acceleration out of corners and controllable throttle on the straights. Racers will notice crisp throttle response and a stable powerband that helps when dialing in gear ratios and suspension settings.

Durability for Frequent Running

The O.S. Speed 21XZ-GT is aimed at users who run regularly and need an engine that can handle repeated track sessions. With routine servicing it holds up well and provides consistent output lap after lap.

The O.S. Speed 21XZ-GT is a practical choice for racers who want reliable nitro performance and repeatable tuning characteristics for competitive 1/10 scale use.