O.S. Engine OSMG2070 Speed Tuned 21VZ-B V-Spec II World Edition Competition Engine  [OSMG2070]

Track-Focused Design of the O.S. Engine OSMG2070 Speed Tuned 21VZ-B V-Spec II World Edition

Engineered for race environments where consistency matters, the O.S. Engine OSMG2070 Speed Tuned 21VZ-B V-Spec II World Edition combines refined componentry with a race-tuned profile. It emphasises repeatable lap times through efficient fuel use and stable high RPM behaviour.

Key Mechanical Enhancements

The engine is fitted with a hardened, chrome-plated 4-port liner and a specially treated crankshaft to reduce wear. A rear ceramic bearing cuts internal drag, while silicone filling in the crankshaft improves the flow characteristics of the intake charge.

Demonstrated Competitive Performance

Its competitive bona fides include use in Atsushi Hara's 2008 world championship run, illustrating the engine's capability to sustain longer stints and reduce the need for frequent refuelling under race conditions.

Fine Tuning and Carb Options

It is supplied with the 21JS slide-valve carburetor and three restrictors (6 mm, 6.5 mm and 7 mm) so tuners can match performance to track demands. Tungsten balancing weights support steady crank rotation at peak revs, aiding driveability.

For seasoned racers, the Speed Tuned 21VZ-B V-Spec II World Edition offers a dependable mix of power, tuning flexibility and efficiency that supports competitive race strategy.