Combo: OS Speed Drake AD4 Engine + T2090SC Exhaust (EFRA2089)

OS-1FH01 OS-Speed Adam Drake AD4 .21 Engine Combo w/TB02 Pipe & Manifold

Specification:

Displacement:  3.49 cc 
Bore: 16.4mm 
Stroke: 16.55mm 
Output: 2.61 hp at 34,000 r.p.m
Practical RPM range: 4,000 - 42,000 r.p.m.
Engine Weight: 350g

Accessories:

O.S. SPEED P3 glow plug
6mm venturi
8mm venturi
Exhaust gasket seal
Dust cap set 3mm/16mm/18mm