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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510-557 of 1,758 Results
O-Ring: GF30 O-Ring: GF30
4.7 out of 5 Customer Rating
O-Ring: GF30
$8.43
Piston: GF30 Piston: GF30
4.7 out of 5 Customer Rating
Piston: GF30
$17.36 Price reduced from $57.86 to
Clearance Sale! ⓘ
Piston Pin: 15LA CV LD Piston Pin: 15LA CV LD
5 out of 5 Customer Rating
Piston Pin: 15LA CV LD
$8.49
Piston Pin: 25F FP Piston Pin: 25F FP
3.3 out of 5 Customer Rating
Piston Pin: 25F FP
$9.85
Piston Pin: 40 46VFR Piston Pin: 40 46VFR
5 out of 5 Customer Rating
Piston Pin: 40 46VFR
$9.85
Piston Ring: BGX-3500 Piston Ring: BGX-3500
3.3 out of 5 Customer Rating
Piston Ring: BGX-3500
$37.80
Tappet Adjusting Screw: 200 Surpass Tappet Adjusting Screw: 200 Surpass
4.3 out of 5 Customer Rating
Tappet Adjusting Screw: 200 Surpass
$9.85
Valve Assembly: New FT-160 Valve Assembly: New FT-160
5 out of 5 Customer Rating
Valve Assembly: New FT-160
$36.85
Crankshaft Spacer: Sirius 7 Crankshaft Spacer: Sirius 7
3.3 out of 5 Customer Rating
Crankshaft Spacer: Sirius 7
$11.75
Drive Hub: 200 Surpass Drive Hub: 200 Surpass
5 out of 5 Customer Rating
Drive Hub: 200 Surpass
$29.60
Gasket Intake Manifold: GF40 Gasket Intake Manifold: GF40
5 out of 5 Customer Rating
Gasket Intake Manifold: GF40
$10.94
Idle Needle: WLA-2 GT55 Idle Needle: WLA-2 GT55
5 out of 5 Customer Rating
Idle Needle: WLA-2 GT55
$15.76
Needle A IFNVA Needle A IFNVA
3.1 out of 5 Customer Rating
Needle A IFNVA
$11.80
Cover Assembly Metering WLA-2: GT55 Cover Assembly Metering WLA-2: GT55
4.5 out of 5 Customer Rating
Cover Assembly Metering WLA-2: GT55
$14.99
O-Ring Silencer #E3080: 35AX O-Ring Silencer #E3080: 35AX
4.1 out of 5 Customer Rating
O-Ring Silencer #E3080: 35AX
$3.28 Price reduced from $10.94 to
Clearance Sale! ⓘ
Piston: 95AX Piston: 95AX
5 out of 5 Customer Rating
Piston: 95AX
$48.41
Piston Ring: FS155A-P Piston Ring: FS155A-P
5 out of 5 Customer Rating
Piston Ring: FS155A-P
$38.03
Thermo Insulator: GF30 Thermo Insulator: GF30
3.5 out of 5 Customer Rating
Thermo Insulator: GF30
$2.24 Price reduced from $7.46 to
Clearance Sale! ⓘ
Thrust Washer 10-15 Thrust Washer 10-15
4.5 out of 5 Customer Rating
Thrust Washer 10-15
$1.95 Price reduced from $6.49 to
Clearance Sale! ⓘ
Valve Collet: FS-91 Surpass Valve Collet: FS-91 Surpass
3.3 out of 5 Customer Rating
Valve Collet: FS-91 Surpass
$10.86
Parallel Key: GT55 Parallel Key: GT55
3.3 out of 5 Customer Rating
Parallel Key: GT55
$7.46
Main Shaft: 3815-1000 Main Shaft: 3815-1000
4.3 out of 5 Customer Rating
Main Shaft: 3815-1000
$8.99
Exhaust Header Assembly: 56 FS Exhaust Header Assembly: 56 FS
4.5 out of 5 Customer Rating
Exhaust Header Assembly: 56 FS
$4.13 Price reduced from $13.78 to
Clearance Sale! ⓘ
Camshaft: FS-91 Surpass Camshaft: FS-91 Surpass
3.7 out of 5 Customer Rating
Camshaft: FS-91 Surpass
$60.57
Carburetor Rotor: #40D Carburetor Rotor: #40D
3.7 out of 5 Customer Rating
Carburetor Rotor: #40D
$11.80
Carburetor Rotor: 91SZ-H Hyper Carburetor Rotor: 91SZ-H Hyper
3.3 out of 5 Customer Rating
Carburetor Rotor: 91SZ-H Hyper
$11.99 Price reduced from $39.99 to
Clearance Sale! ⓘ
Piston Pin: 56 FS Piston Pin: 56 FS
4.5 out of 5 Customer Rating
Piston Pin: 56 FS
$11.91
Cylinder and Piston Assembly: O.S. Speed B2104 Cylinder and Piston Assembly: O.S. Speed B2104
4.5 out of 5 Customer Rating
Cylinder and Piston Assembly: O.S. Speed B2104
$193.70
O.S. Cylinder and Piston Assy Speed B2103 Type S O.S. Cylinder and Piston Assy Speed B2103 Type S
5 out of 5 Customer Rating
O.S. Cylinder and Piston Assy Speed B2103 Type S
$193.68
Universal Nipple: #21, T1202 Speed Universal Nipple: #21, T1202 Speed
4.5 out of 5 Customer Rating
Universal Nipple: #21, T1202 Speed
$11.95
Head Gasket: B2101 Speed Head Gasket: B2101 Speed
4.7 out of 5 Customer Rating
Head Gasket: B2101 Speed
$12.04
Piston Pin: 25XZ Piston Pin: 25XZ
5 out of 5 Customer Rating
Piston Pin: 25XZ
$7.99
Screw Set (8): 18TZ-TX Screw Set (8): 18TZ-TX
4.7 out of 5 Customer Rating
Screw Set (8): 18TZ-TX
$9.85
T-1060 Silencer Clamp T-1060 Silencer Clamp
5 out of 5 Customer Rating
T-1060 Silencer Clamp
$11.47
Plug Cable: Sirius 7 Plug Cable: Sirius 7
3.1 out of 5 Customer Rating
Plug Cable: Sirius 7
$10.94
Connecting Rod: 35-40FP, 40 LA Connecting Rod: 35-40FP, 40 LA
4.7 out of 5 Customer Rating
Connecting Rod: 35-40FP, 40 LA
$21.10
Cover Plate: FS155A-P Cover Plate: FS155A-P
5 out of 5 Customer Rating
Cover Plate: FS155A-P
$6.61 Price reduced from $22.04 to
Clearance Sale! ⓘ
Crankshaft: 15LA Crankshaft: 15LA
5 out of 5 Customer Rating
Crankshaft: 15LA
$23.22
Crankshaft: 120AX Crankshaft: 120AX
4.1 out of 5 Customer Rating
Crankshaft: 120AX
$80.37
Cylinder Head: FT-160 Cylinder Head: FT-160
4.5 out of 5 Customer Rating
Cylinder Head: FT-160
$87.19
Cylinder Head: FF-320 Cylinder Head: FF-320
5 out of 5 Customer Rating
Cylinder Head: FF-320
$76.85
Intake Manifold Set: Sirius 7 Intake Manifold Set: Sirius 7
3.9 out of 5 Customer Rating
Intake Manifold Set: Sirius 7
$8.84 Price reduced from $29.48 to
Clearance Sale! ⓘ
O-Ring PRC: 120Surpass O-Ring PRC: 120Surpass
4.7 out of 5 Customer Rating
O-Ring PRC: 120Surpass
$6.49
Piston Ring: FS-62V Piston Ring: FS-62V
4.7 out of 5 Customer Rating
Piston Ring: FS-62V
$10.42 Price reduced from $34.76 to
Clearance Sale! ⓘ
Rocker Cover, Black: FSa-56II Rocker Cover, Black: FSa-56II
3.3 out of 5 Customer Rating
Rocker Cover, Black: FSa-56II
$5.76 Price reduced from $19.22 to
Clearance Sale! ⓘ
Screw Set (12): 108FSR Screw Set (12): 108FSR
4.3 out of 5 Customer Rating
Screw Set (12): 108FSR
$17.16
Standoff 5x44.5mm 1-3/4" (4): GT55 Standoff 5x44.5mm 1-3/4" (4): GT55
4.7 out of 5 Customer Rating
Standoff 5x44.5mm 1-3/4" (4): GT55
$44.10
Thrust Washer Rear 30Wankel Thrust Washer Rear 30Wankel
5 out of 5 Customer Rating
Thrust Washer Rear 30Wankel
$6.49
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