O.S.SPEED B21 ADAM DRAKE 4 Buggy Engine
Introducing the latest collaboration off-road 3.5cc engine with world famous O.S. Team Driver Adam Drake!

New items vs AD3:
  • Cylinder liner: Revised port-design for more torque.
  • Crankshaft: Inner diameter has changed for better low to mid end power.
  • Combustion chamber: Redesigned for more torque with lower nitro.
  • Cooling head: Extra cooling fin for better cooling, reduced weight, lower center gravity for better balance and new laser design with double anodized colors.
B21 AD4 Buggy Engine
Including:
  • 6mm Venturi for Buggy
  • 8mm Venturi for Truggy
  • P3 Glowplug
B21 AD4 Buggy Engine Combo Set
Also including:
  • TB02 EFRA2089 Pipe
  • MB01-75 Exhaust Manifold
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