O.S. SPEED B21 ADAM DRAKE edition 4 combustion engine combo with exhaust

Offered as a limited edition, the B21 Adam Drake Edition 4 is aimed at demanding racers looking for an engine that delivers power, torque, consistency and reliability under the most extreme racing conditions. This version is a direct evolution of Edition 3, featuring targeted technical improvements developed for real race performance.

A competition engine developed with Adam Drake

The collaboration between O.S. SPEED and Adam Drake ensures that every aspect of the engine meets the needs of top-level drivers. Sharp acceleration, strong mid-range response, thermal stability and predictable behavior over long finals make this engine perfectly suited for 1/8 nitro buggy competition.

Technical improvements of Edition 4

Compared to the previous version, the O.S. SPEED B21 Adam Drake Edition 4 benefits from several major upgrades.

The cylinder liner features a revised port design, improving internal airflow and delivering increased torque, especially noticeable during acceleration and technical sections.

The crankshaft has been redesigned with a modified internal diameter, enhancing cylinder filling and providing stronger power at low and mid RPM, a key advantage for traction and corner exits in 1/8 buggy racing.

The cooling head has also been upgraded with an additional fin for improved cooling efficiency. Weight has been reduced, the center of gravity lowered, and a new laser-etched dual-color anodized design gives the engine a distinctive competition look.

Built for serious racers

The O.S. SPEED B21 Adam Drake Edition 4 (engine only) is intended exclusively for competitive 1/8 nitro buggy drivers. It requires precise tuning but rewards experienced racers with exceptional performance and race-level consistency, making it a reference choice for top-level competition.