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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97-144 of 1,758 Results
Piston Ring: 108FSR Piston Ring: 108FSR
4.1 out of 5 Customer Rating
Piston Ring: 108FSR
$29.60
Inner Head: T1202 Speed Inner Head: T1202 Speed
5 out of 5 Customer Rating
Inner Head: T1202 Speed
$37.99
Front Bearing: 21XZ-B Front Bearing: 21XZ-B
5 out of 5 Customer Rating
Front Bearing: 21XZ-B
$30.44
Needle #40N Needle #40N
5 out of 5 Customer Rating
Needle #40N
$13.78
Drive Washer: FS-95V8 Drive Washer: FS-95V8
3.4 out of 5 Customer Rating
Drive Washer: FS-95V8
$10.94
Gasket Set: 25FX Gasket Set: 25FX
3.3 out of 5 Customer Rating
Gasket Set: 25FX
$7.46
Inner Head O-Ring: (S-32)(Black) B2104 Inner Head O-Ring: (S-32)(Black) B2104
4.9 out of 5 Customer Rating
Inner Head O-Ring: (S-32)(Black) B2104
$10.70
Ball Link #3 20K: 21VZ-R Ball Link #3 20K: 21VZ-R
5 out of 5 Customer Rating
Ball Link #3 20K: 21VZ-R
$5.15 Price reduced from $17.16 to
Clearance Sale! ⓘ
Connecting Rod: 30VG Connecting Rod: 30VG
5 out of 5 Customer Rating
Connecting Rod: 30VG
$27.48
Connecting Rod: 37SZ-H Connecting Rod: 37SZ-H
3.6 out of 5 Customer Rating
Connecting Rod: 37SZ-H
$22.04
Connecting Rod: 91SX-H Complete Connecting Rod: 91SX-H Complete
5 out of 5 Customer Rating
Connecting Rod: 91SX-H Complete
$27.48
Connecting Rod: FS155A-P Connecting Rod: FS155A-P
4.4 out of 5 Customer Rating
Connecting Rod: FS155A-P
$14.52 Price reduced from $48.43 to
Clearance Sale! ⓘ
Cover Plate Gasket: 75AX Cover Plate Gasket: 75AX
4 out of 5 Customer Rating
Cover Plate Gasket: 75AX
$6.49
Cover Plate: 15LA Cover Plate: 15LA
4 out of 5 Customer Rating
Cover Plate: 15LA
$10.86
Cylinder/Piston/Rod: T1201 Speed Cylinder/Piston/Rod: T1201 Speed
5 out of 5 Customer Rating
Cylinder/Piston/Rod: T1201 Speed
$193.94
Cover Plate: FS-95V Cover Plate: FS-95V
3.4 out of 5 Customer Rating
Cover Plate: FS-95V
$21.17
Cover Plate: GT15 Cover Plate: GT15
4.8 out of 5 Customer Rating
Cover Plate: GT15
$18.99
Cover Plate: 50SX-H Cover Plate: 50SX-H
4.2 out of 5 Customer Rating
Cover Plate: 50SX-H
$11.80
Cover Plate: 120AX Cover Plate: 120AX
4 out of 5 Customer Rating
Cover Plate: 120AX
$17.16
Cylinder Rebuild Kit: 21XZ-GT Speed Cylinder Rebuild Kit: 21XZ-GT Speed
4.4 out of 5 Customer Rating
Cylinder Rebuild Kit: 21XZ-GT Speed
$66.47 Price reduced from $221.55 to
Clearance Sale! ⓘ
Cover Plate: FL-70 Cover Plate: FL-70
5 out of 5 Customer Rating
Cover Plate: FL-70
$9.99
Crankcase: FS72 Alpha Crankcase: FS72 Alpha
5 out of 5 Customer Rating
Crankcase: FS72 Alpha
$29.79 Price reduced from $87.39 to
Clearance Sale! ⓘ
Crankcase: 120AX Crankcase: 120AX
5 out of 5 Customer Rating
Crankcase: 120AX
$135.55
Crankcase: 200 Surpass Crankcase: 200 Surpass
3.4 out of 5 Customer Rating
Crankcase: 200 Surpass
$190.28
Crankshaft: 55AX Crankshaft: 55AX
4.4 out of 5 Customer Rating
Crankshaft: 55AX
$55.12
Crankshaft: 21XZ-R Crankshaft: 21XZ-R
4.2 out of 5 Customer Rating
Crankshaft: 21XZ-R
$144.99
Crankshaft: 30VG Crankshaft: 30VG
4 out of 5 Customer Rating
Crankshaft: 30VG
$52.99
Crankcase: GT15HZ Crankcase: GT15HZ
4.8 out of 5 Customer Rating
Crankcase: GT15HZ
$190.29
Crankshaft: 21XR-B Version II Crankshaft: 21XR-B Version II
4.8 out of 5 Customer Rating
Crankshaft: 21XR-B Version II
$18.83 Price reduced from $62.78 to
Clearance Sale! ⓘ
Crankshaft: 91HZ Crankshaft: 91HZ
4.4 out of 5 Customer Rating
Crankshaft: 91HZ
$91.51
Crankshaft: 200 Surpass Crankshaft: 200 Surpass
4 out of 5 Customer Rating
Crankshaft: 200 Surpass
$37.62 Price reduced from $125.39 to
Clearance Sale! ⓘ
Crankshaft: 240-300 Crankshaft: 240-300
5 out of 5 Customer Rating
Crankshaft: 240-300
$284.01
Crankshaft: GT22 Crankshaft: GT22
4.4 out of 5 Customer Rating
Crankshaft: GT22
$37.67 Price reduced from $125.57 to
Clearance Sale! ⓘ
Outer Head: O.S. Speed R2104 Outer Head: O.S. Speed R2104
3.6 out of 5 Customer Rating
Outer Head: O.S. Speed R2104
$148.60
Piston: 56 FS Piston: 56 FS
4 out of 5 Customer Rating
Piston: 56 FS
$29.49
Inner Head: 19XZ-B Speed Inner Head: 19XZ-B Speed
5 out of 5 Customer Rating
Inner Head: 19XZ-B Speed
$57.73
Inner Head: Speed 21XZ-GT Inner Head: Speed 21XZ-GT
5 out of 5 Customer Rating
Inner Head: Speed 21XZ-GT
$15.81 Price reduced from $52.69 to
Clearance Sale! ⓘ
Outer Head: Speed 21 V-Spec Outer Head: Speed 21 V-Spec
3.4 out of 5 Customer Rating
Outer Head: Speed 21 V-Spec
$42.00 Price reduced from $139.99 to
Clearance Sale! ⓘ
Cylinder Head: FSa-56II Cylinder Head: FSa-56II
4.8 out of 5 Customer Rating
Cylinder Head: FSa-56II
$70.43
Cylinder Head: FS72 Alpha Cylinder Head: FS72 Alpha
4.2 out of 5 Customer Rating
Cylinder Head: FS72 Alpha
$76.70
Outer Head: R2101 Speed Outer Head: R2101 Speed
3.4 out of 5 Customer Rating
Outer Head: R2101 Speed
$102.35
Heat Sink Head: 50SX-H Heat Sink Head: 50SX-H
5 out of 5 Customer Rating
Heat Sink Head: 50SX-H
$50.76
Connecting Rod: 56 FS Connecting Rod: 56 FS
3.2 out of 5 Customer Rating
Connecting Rod: 56 FS
$22.04
M1006SC Manifold M1006SC Manifold
3.6 out of 5 Customer Rating
M1006SC Manifold
$21.48 Price reduced from $71.60 to
Clearance Sale! ⓘ
Carburetor Reducer, 6.5mm: OS Speed B21 Pink Rhonda Drake Edition Carburetor Reducer, 6.5mm: OS Speed B21 Pink Rhonda Drake Edition
5 out of 5 Customer Rating
Carburetor Reducer, 6.5mm: OS Speed B21 Pink Rhonda Drake Edition
$22.11
Crankshaft O.S. Speed T1204 Crankshaft O.S. Speed T1204
4.6 out of 5 Customer Rating
Crankshaft O.S. Speed T1204
$126.49
Outter Head: O.S.SPEED R21GT2 Outter Head: O.S.SPEED R21GT2
5 out of 5 Customer Rating
Outter Head: O.S.SPEED R21GT2
$133.99
Air Bleed Screw: FL70 Air Bleed Screw: FL70
4.2 out of 5 Customer Rating
Air Bleed Screw: FL70
$5.99
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