OS SPEED B21 ADAM DRAKE 4 Engine and TB02 EFRA2089 & MB01-75 Pipe Combo Set

This is the B21 Adam Drake Edition 4 .21 off-road racing engine with the TB02 EFRA2089 tuned silencer and MB01-75 exhaust manifold combo set from OS Speed.


The B21 Adam Drake Edition 4 is O.S. Speed's latest collaboration engine with O.S. team driver Adam Drake. The cylinder liner, crankshaft and outer head have been redesigned to his specification for better balance, more torque and more power. This combo set adds the TB02 EFRA2089 tuned silencer and MB01-75 exhaust manifold.

Key Features:

• .21 (3.49cc) O.S. Speed B21 off-road racing engine
• Developed and tested with O.S. team driver and ROAR champion Adam Drake
• Newly designed 3-port cylinder liner with revised exhaust dimensions
• Revised crankshaft inner diameter
• Double anodised black and blue outer head with a new laser design
• Redesigned inner head combustion chamber
• Blue anodised 6II and 8mm carburettor reducers
• Supplied with the TB02 EFRA2089 tuned silencer and MB01-75 exhaust manifold

Package includes:

• 1x O.S. Speed B21 Adam Drake Edition 4 .21 Engine
• 1x TB02 EFRA2089 Tuned Silencer
• 1x MB01-75 Exhaust Manifold
• 1x O.S. Speed P3 Glow Plug
• 1x Carburettor Reducer 6II (Blue, Aluminium)
• 1x Carburettor Reducer 8mm (Blue, Aluminium)
• Exhaust Seal Ring
• 3x Dust Caps (3mm, 16mm, 18mm)

Required for Operation (Not Included)

• Glow fuel for model two-stroke engines
• Glowplug igniter
• Starter box
• Fuel filter
• Fuel pump or squeeze bottle

Technical Specifications:

• Availability: Can supply direct from importer
• Model: OS 1FH01
• Manufacturer: