O.S. Engines

Piston Pin: 108FSR

Slide Valve 12F3: T1201 Speed

Crankcase: 25LA Natural

Radial Mount Screw Set: Sirius 7

Link Pin: Sirius 7

Powerboost Pipe: III 50, 55HZ-H

Pump Fixing Screw Assembly: 91SZ-H Hyper

Screw Set (8): 37SZ-H

Cylinder Rebuild Kit: R2101 Speed

Cylinder Liner: 120 240

Rocker Support: FS155A-P

Drive Shaft Spacer: Sirius 7

Prop Nut 1/4 20-61

Gasket Set: 91FX

Standoff 5x50.8mm 2" (4): GT55

Crankshaft: 21VZ-B (P)

Connecting Rod: 70SZ-H

Gasket Head, .1 Brass: 21XZ-R

Cover Fitting Screw (4) FL-70

Intake Manifold Assembly: FT-120 and FT-160

Cylinder Head: FS-91-P

55HZ-R DRS Ringed .55 Helicopter Engine

Camshaft Bearing: F 120-300

Piston Pin: FS-120