O.S. Engine OSMG2072 21VZ-R Turbo II .21 On-Road Racer Engine  [OSMG2072]

Track-Tuned Turbo for 1/8 On-Road Racing

The O.S. Engine 21VZ-R Turbo II, model OSMG2072, is a compact yet powerful option for 1/8 scale on-road competitors. Known for consistent operation and race-focused upgrades, this .21 engine balances durability with high rpm capability to handle demanding track sessions.

Refined Crankcase and Port Flow

Internal crankcase revisions promote cleaner mixture flow, and the re-shaped liner port helps maintain steady power across the rev range. These refinements are aimed at racers who need predictable throttle response and efficient combustion at speed.

Robust Components and Turbo Head Design

The button-shaped inner head improves high-end rpm behavior while the piston, turned from bar stock, adds mechanical strength for prolonged use. The classic two-piece turbo cylinder head paired with a rear exhaust layout keeps the package familiar to experienced tuners.

Precision Carburetion and Flexible Fitment

The 20K slide-valve carburetor enables fine tuning of fuel delivery to match track conditions, and the repositionable universal fuel inlet nipple lets you adapt installation to a variety of chassis arrangements.

For experienced hobbyists and club racers, the O.S. Engine 21VZ-R Turbo II offers a dependable blend of tunability and strength. With race-oriented features and solid construction, it suits drivers who refine engine setup for lap time gains.