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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1,153-1,200 of 1,758 Results
Crankcase O.S. Speed T1204 Crankcase O.S. Speed T1204
3.5 out of 5 Customer Rating
Crankcase O.S. Speed T1204
$86.74
Outer Head: O.S. Max .12 TG Version 4 Outer Head: O.S. Max .12 TG Version 4
3.1 out of 5 Customer Rating
Outer Head: O.S. Max .12 TG Version 4
$74.79
55HZ-H Hyper Ringed .55 Helicopter Engine 55HZ-H Hyper Ringed .55 Helicopter Engine
3.3 out of 5 Customer Rating
55HZ-H Hyper Ringed .55 Helicopter Engine
$418.63
Choke Arm Assembly: WLA-2, GT55 Choke Arm Assembly: WLA-2, GT55
5 out of 5 Customer Rating
Choke Arm Assembly: WLA-2, GT55
$7.46
Carburetor: FT160, FF320 Carburetor: FT160, FF320
4.1 out of 5 Customer Rating
Carburetor: FT160, FF320
$102.95
Carburetor Reed Valve Gasket: GT22 Carburetor Reed Valve Gasket: GT22
3.7 out of 5 Customer Rating
Carburetor Reed Valve Gasket: GT22
$10.94
Muffler Extension Adapter E-3070: 873 Muffler Extension Adapter E-3070: 873
5 out of 5 Customer Rating
Muffler Extension Adapter E-3070: 873
$19.05
Intake Manifold Gasket 200 Surpass Intake Manifold Gasket 200 Surpass
5 out of 5 Customer Rating
Intake Manifold Gasket 200 Surpass
$7.46
E-4051 Muffler: GT15HZ E-4051 Muffler: GT15HZ
5 out of 5 Customer Rating
E-4051 Muffler: GT15HZ
$97.70
T-2060 WN Tuned Pipe T-2060 WN Tuned Pipe
4.8 out of 5 Customer Rating
T-2060 WN Tuned Pipe
$42.74 Price reduced from $142.48 to
Clearance Sale! ⓘ
Radial Mount Screw Set: Sirius 7 Radial Mount Screw Set: Sirius 7
5 out of 5 Customer Rating
Radial Mount Screw Set: Sirius 7
$4.72 Price reduced from $15.76 to
Clearance Sale! ⓘ
T-2100SC Tuned Pipe T-2100SC Tuned Pipe
3.3 out of 5 Customer Rating
T-2100SC Tuned Pipe
$152.41
Cylinder/Piston/Rod Set: O.S. Max .12 TG Version 4 Cylinder/Piston/Rod Set: O.S. Max .12 TG Version 4
4.9 out of 5 Customer Rating
Cylinder/Piston/Rod Set: O.S. Max .12 TG Version 4
$111.36
Connecting Rod: 32SX-H Connecting Rod: 32SX-H
4.4 out of 5 Customer Rating
Connecting Rod: 32SX-H
$21.10
Connecting Rod: 21VF/SE Connecting Rod: 21VF/SE
4.1 out of 5 Customer Rating
Connecting Rod: 21VF/SE
$21.10
Connecting Rod: 18TM Connecting Rod: 18TM
4.8 out of 5 Customer Rating
Connecting Rod: 18TM
$48.51
Piston Pin: 75AX Piston Pin: 75AX
3.7 out of 5 Customer Rating
Piston Pin: 75AX
$3.57 Price reduced from $11.91 to
Clearance Sale! ⓘ
Connecting Rod: 40-46 Connecting Rod: 40-46
3.6 out of 5 Customer Rating
Connecting Rod: 40-46
$22.04
Exhaust Header Pipe M1021: 21TM Exhaust Header Pipe M1021: 21TM
3.7 out of 5 Customer Rating
Exhaust Header Pipe M1021: 21TM
$48.55
18TM Revo Manifold 18TM Revo Manifold
4.1 out of 5 Customer Rating
18TM Revo Manifold
$52.77
Center Manifold: IL-300 Dia Star Center Manifold: IL-300 Dia Star
5 out of 5 Customer Rating
Center Manifold: IL-300 Dia Star
$14.53 Price reduced from $48.44 to
Clearance Sale! ⓘ
Crankshaft: O.S.SPEED R21GT2 Crankshaft: O.S.SPEED R21GT2
3.8 out of 5 Customer Rating
Crankshaft: O.S.SPEED R21GT2
$249.99
Crankshaft: 12XZ Speed Crankshaft: 12XZ Speed
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed
$94.99
Crankshaft: T1202 Speed Crankshaft: T1202 Speed
4.8 out of 5 Customer Rating
Crankshaft: T1202 Speed
$37.63 Price reduced from $125.42 to
Clearance Sale! ⓘ
T-2080SC Silencer: 21XZ-R, 21VG T-2080SC Silencer: 21XZ-R, 21VG
3.6 out of 5 Customer Rating
T-2080SC Silencer: 21XZ-R, 21VG
$55.45 Price reduced from $184.82 to
Clearance Sale! ⓘ
Connecting Rod: 70SZ-H Connecting Rod: 70SZ-H
3.2 out of 5 Customer Rating
Connecting Rod: 70SZ-H
$29.49
RP6 Turbo Glow Plug Medium On-Road RP6 Turbo Glow Plug Medium On-Road
4.5 out of 5 Customer Rating
RP6 Turbo Glow Plug Medium On-Road
$14.99
Heat Sink Head: 91SX-H Heat Sink Head: 91SX-H
5 out of 5 Customer Rating
Heat Sink Head: 91SX-H
$17.39 Price reduced from $57.99 to
Clearance Sale! ⓘ
Crankshaft: R2103 Speed Crankshaft: R2103 Speed
3.6 out of 5 Customer Rating
Crankshaft: R2103 Speed
$64.75 Price reduced from $215.83 to
Clearance Sale! ⓘ
Crankshaft: 12XZ Speed Spec II Crankshaft: 12XZ Speed Spec II
4.4 out of 5 Customer Rating
Crankshaft: 12XZ Speed Spec II
$35.99 Price reduced from $119.97 to
Clearance Sale! ⓘ
Connecting Rod with Bearings: GT60 Connecting Rod with Bearings: GT60
3.7 out of 5 Customer Rating
Connecting Rod with Bearings: GT60
$97.90
Control Arm: #9B Control Arm: #9B
4.5 out of 5 Customer Rating
Control Arm: #9B
$14.73
Connecting Rod: GT22 Connecting Rod: GT22
5 out of 5 Customer Rating
Connecting Rod: GT22
$17.36 Price reduced from $57.87 to
Clearance Sale! ⓘ
E4050 In-Cowl Muffler: 65AX E4050 In-Cowl Muffler: 65AX
5 out of 5 Customer Rating
E4050 In-Cowl Muffler: 65AX
$67.33
Powerboost Pipe: III 50, 55HZ-H Powerboost Pipe: III 50, 55HZ-H
3.3 out of 5 Customer Rating
Powerboost Pipe: III 50, 55HZ-H
$184.86
Remote Needle Bracket: 160FX Remote Needle Bracket: 160FX
3.3 out of 5 Customer Rating
Remote Needle Bracket: 160FX
$7.46
TR02 Tuned Silencer Set EFRA2165 TR02 Tuned Silencer Set EFRA2165
4.7 out of 5 Customer Rating
TR02 Tuned Silencer Set EFRA2165
$227.84
T-1070SC L52 Pipe T-1070SC L52 Pipe
5 out of 5 Customer Rating
T-1070SC L52 Pipe
$135.44
Crankshaft: 25XZ Crankshaft: 25XZ
3.4 out of 5 Customer Rating
Crankshaft: 25XZ
$34.50 Price reduced from $114.99 to
Clearance Sale! ⓘ
Crankshaft: 19XZ-B Speed Crankshaft: 19XZ-B Speed
4.8 out of 5 Customer Rating
Crankshaft: 19XZ-B Speed
$52.61 Price reduced from $175.75 to
Clearance Sale! ⓘ
Crankshaft: Speed B2102 Crankshaft: Speed B2102
5 out of 5 Customer Rating
Crankshaft: Speed B2102
$193.70
O.S. Crankshaft OS Speed R21GT O.S. Crankshaft OS Speed R21GT
4.8 out of 5 Customer Rating
O.S. Crankshaft OS Speed R21GT
$238.82
Crankshaft: 55HZ Hyper Crankshaft: 55HZ Hyper
4.4 out of 5 Customer Rating
Crankshaft: 55HZ Hyper
$66.24
Cam Cover: FS-40 Surpass Cam Cover: FS-40 Surpass
5 out of 5 Customer Rating
Cam Cover: FS-40 Surpass
$9.44
Cam Cover: FS-120 Surpass Cam Cover: FS-120 Surpass
4.1 out of 5 Customer Rating
Cam Cover: FS-120 Surpass
$10.86
Crankshaft: GT60 Crankshaft: GT60
5 out of 5 Customer Rating
Crankshaft: GT60
$58.14 Price reduced from $193.79 to
Clearance Sale! ⓘ
Outer Head: B2102 Speed Outer Head: B2102 Speed
3.6 out of 5 Customer Rating
Outer Head: B2102 Speed
$102.52
O.S. Outer Head Speed B2103 Type R & Type S O.S. Outer Head Speed B2103 Type R & Type S
5 out of 5 Customer Rating
O.S. Outer Head Speed B2103 Type R & Type S
$30.74 Price reduced from $102.47 to
Clearance Sale! ⓘ
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