O.S. Engines

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Quality and performance has made O.S. the standard in RC engines for over 80 years.
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1,201-1,224 of 1,755 Results
Crankcase: 12XZ Spec II Speed Crankcase: 12XZ Spec II Speed
4.1 out of 5 Customer Rating
$69.99
Crankshaft: 21XZ-B Spec 2 Crankshaft: 21XZ-B Spec 2
3.9 out of 5 Customer Rating
$210.21
Cylinder & Piston Assembly: R2101 Speed Cylinder & Piston Assembly: R2101 Speed
4.7 out of 5 Customer Rating
$177.63
Cover Plate: 28XZ Cover Plate: 28XZ
5 out of 5 Customer Rating
$6.67 Price reduced from $22.26 to
Clearance Sale!
Crankshaft: 12TG-P Crankshaft: 12TG-P
4.5 out of 5 Customer Rating
$50.83
Crankshaft: 21 Speed V-Spec Crankshaft: 21 Speed V-Spec
5 out of 5 Customer Rating
$174.99
O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT
3.3 out of 5 Customer Rating
$89.58 Price reduced from $298.61 to
Clearance Sale!
Heat Sink Head: 30VG Heat Sink Head: 30VG
3.1 out of 5 Customer Rating
$91.34
Inner Head: 12XZ Speed Inner Head: 12XZ Speed
5 out of 5 Customer Rating
$30.99
Gasket Set: 12TG Gasket Set: 12TG
4.5 out of 5 Customer Rating
$10.94
Pump Plate (PD-09) 2/3 Assembly: GF30 II Pump Plate (PD-09) 2/3 Assembly: GF30 II
3.4 out of 5 Customer Rating
$71.58
90 Degree In-Cowl Header: FS110A 90 Degree In-Cowl Header: FS110A
4.8 out of 5 Customer Rating
$36.85
Intake Manifold 200 Surpass Intake Manifold 200 Surpass
4.2 out of 5 Customer Rating
$34.86
Motor Mount: 15CV-A, 10LA Motor Mount: 15CV-A, 10LA
4 out of 5 Customer Rating
$25.44
Connecting Rod: GF40 Connecting Rod: GF40
4.2 out of 5 Customer Rating
$70.40
Crankcase: GT15 Crankcase: GT15
5 out of 5 Customer Rating
$125.03
Crankpin Stop Screw: GT60 Crankpin Stop Screw: GT60
4.8 out of 5 Customer Rating
$11.80
Cylinder Head: FS-91-P Cylinder Head: FS-91-P
4.8 out of 5 Customer Rating
$81.94
Cylinder Liner: GT55 Cylinder Liner: GT55
4.2 out of 5 Customer Rating
$44.33 Price reduced from $118.99 to
Clearance Sale!
Gasket Set: FS-120 II Gasket Set: FS-120 II
5 out of 5 Customer Rating
$10.94
Cover Gasket: FS-70 Ultimate Cover Gasket: FS-70 Ultimate
3.4 out of 5 Customer Rating
$11.91
Silencer Body: 200 Surpass Silencer Body: 200 Surpass
4.4 out of 5 Customer Rating
$87.21
O-Ring IV PRC #6H Rubber O-Ring IV PRC #6H Rubber
5 out of 5 Customer Rating
$6.49
Pushrod Cover: FS-26 Surpass Pushrod Cover: FS-26 Surpass
5 out of 5 Customer Rating
$8.49