O.S. Speed B21 Adam Drake Edition 3 1/8 Buggy Engine (OSMG2130)

OS Speed B21 Adam Drake Edition 3 1/8 Buggy Engine is a high-performance nitro powerplant designed for competitive 1/8-scale buggy racing. Developed in collaboration with Adam Drake, the AD3 edition refines the B21 platform with upgrades that boost throttle response and driveability, delivering strong, manageable power on demanding tracks. A boost bypass processing for the crankcase improves throttle response and smoothness, while the signature cooling head is black anodized with blue outer rings to reduce weight and help lower the center of gravity for improved handling. The inner head uses an O-ring to reduce vibration and dust intrusion, and the backplate features a built-in thrust plate to minimize wear between the rod and backplate, extending engine life. Two blue anodized carburetor reducers are included—6.5mm for buggy and 7.5mm for truggy—allowing tuning for different classes.

Designed for both buggy and truggy competition, this engine combines a redesigned cylinder liner with optimized porting, a DLC-coated crankshaft with larger double tungsten counterweights, and a semi-long stroke configuration for a balanced mix of bottom-end torque and top-end power. A durable front steel bearing and ceramic rear bearing support long-term reliability, and the included reducer sizes enable on-track tuning. Expect a linear power delivery, solid fuel economy, and ample overall power that yields confident handling across tracks. The AD3 can be purchased as an engine-only unit or as part of a performance combo.