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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913-936 of 1,808 Results
Inner Head: 21XZ-R Speed Inner Head: 21XZ-R Speed
3.6 out of 5 Customer Rating
Inner Head: 21XZ-R Speed
$57.96
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
O.S. Built-Up Parts Set Cyl Piston OS Speed R21GT
$298.61
Outer Head: 28XZ Outer Head: 28XZ
3.7 out of 5 Customer Rating
Outer Head: 28XZ
$102.52
Outer Head: 21XZ-R VII Outer Head: 21XZ-R VII
5 out of 5 Customer Rating
Outer Head: 21XZ-R VII
$91.32
Crankcase: T1201 Speed Crankcase: T1201 Speed
5 out of 5 Customer Rating
Crankcase: T1201 Speed
$87.17
Crankcase: 21XZ-R Speed Crankcase: 21XZ-R Speed
5 out of 5 Customer Rating
Crankcase: 21XZ-R Speed
$157.24
Crankcase: R21 Crankcase: R21
3.7 out of 5 Customer Rating
Crankcase: R21
$119.70
Crankcase: 12XZ Spec II Speed Crankcase: 12XZ Spec II Speed
4.1 out of 5 Customer Rating
Crankcase: 12XZ Spec II Speed
$69.99
Crankcase: 21TM Crankcase: 21TM
4.2 out of 5 Customer Rating
Crankcase: 21TM
$97.72
Crankcase: B2101 Speed Crankcase: B2101 Speed
5 out of 5 Customer Rating
Crankcase: B2101 Speed
$152.45
Crankcase: 120 Surpass Crankcase: 120 Surpass
3.7 out of 5 Customer Rating
Crankcase: 120 Surpass
$162.87
Crankcase Plug: GT55 Crankcase Plug: GT55
3.4 out of 5 Customer Rating
Crankcase Plug: GT55
$17.16
Crankcase: GGT10 Crankcase: GGT10
4.1 out of 5 Customer Rating
Crankcase: GGT10
$104.09
Crankcase: GT15 Crankcase: GT15
5 out of 5 Customer Rating
Crankcase: GT15
$125.03
Cylinder & Piston Speed: T1202 Cylinder & Piston Speed: T1202
4 out of 5 Customer Rating
Cylinder & Piston Speed: T1202
$127.43
Cylinder & Piston: 25LA Cylinder & Piston: 25LA
5 out of 5 Customer Rating
Cylinder & Piston: 25LA
$35.48
Cylinder Rebuild Kit: 21XR-B Cylinder Rebuild Kit: 21XR-B
4.1 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XR-B
$149.93
O.S. Cylinder And Piston Speed: T1203 O.S. Cylinder And Piston Speed: T1203
4.4 out of 5 Customer Rating
O.S. Cylinder And Piston Speed: T1203
$119.99
Cylinder & Piston: 12TR (P)-T Cylinder & Piston: 12TR (P)-T
5 out of 5 Customer Rating
Cylinder & Piston: 12TR (P)-T
$75.99
Cylinder & Piston: 21XZ-GT Speed Cylinder & Piston: 21XZ-GT Speed
4.1 out of 5 Customer Rating
Cylinder & Piston: 21XZ-GT Speed
$177.63
Inner Head: speed 21XZ-B Spec III Inner Head: speed 21XZ-B Spec III
3.3 out of 5 Customer Rating
Inner Head: speed 21XZ-B Spec III
$52.69
Inner Head: 28XZ Inner Head: 28XZ
5 out of 5 Customer Rating
Inner Head: 28XZ
$57.86
Cylinder Head: 56 FS Cylinder Head: 56 FS
5 out of 5 Customer Rating
Cylinder Head: 56 FS
$63.20
Heat Sink Head: 30VG Heat Sink Head: 30VG
3.1 out of 5 Customer Rating
Heat Sink Head: 30VG
$91.34
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