O.S. Speed B21 Adam Drake Edition 4 Combo Set

The O.S. Speed B21 Adam Drake Edition 4 Combo Set is a competition-focused .21 nitro engine package designed for serious 1/8-scale off-road buggy racing. Developed with input from Adam Drake, this engine is built to deliver smooth drivability, strong usable power, and consistent performance across demanding off-road track conditions.

The B21 Adam Drake Edition 4 is designed for racers who want a controllable powerband that is easier to manage through rough sections, low-grip areas, technical corners, and long straights. Its race-focused design helps provide the throttle response and reliability needed for competitive nitro buggy racing.

As a combo set, this package is a strong choice for drivers looking for a matched O.S. Speed engine setup instead of piecing together components separately.

Key features

* Genuine O.S. Speed B21 Adam Drake Edition 4 Combo Set

* .21 nitro engine for 1/8-scale off-road buggy racing

* Developed with Adam Drake

* Designed for smooth, controllable power delivery

* Strong usable power for changing track conditions

* Race-focused O.S. Speed performance and reliability

* Great choice for competitive buggy racers

* Combo package for a more complete engine setup

Spec--------------------------- Displacement： 3.49 cc / 0.213cu.in. Bore: 16.4mm / 0.646 in. Stroke: 16.55mm / 0.652 in. Output :2.65 ps / 2.61 hp / 34,000 r.p.m. Practical RPM range: 4,000-42,000 r.p.m. Engine Weight:352g / 12.42 oz.

Standard accessories--------------------------- O.S. SPEED P3 glow plug Reducer　6II (blue) AL2・Reducer　8mm (blue) AL Exhaust seal ring Dust cap set 3mm/16mm/18mm

Free ground shipping.