O.S. Engines

Quality and performance has made O.S. the standard in RC engines for over 80 years.

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Drive Washer: T-120 160

$10.50 ~~Price reduced from $29.60 to~~

Clearance Sale! ⓘ

Intake Manifold: FS-120II

$8.85 ~~Price reduced from $29.49 to~~

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Needle Valve Assembly: 40G

$26.24

Intake Pipe Right: FT-120 160

$6.71 ~~Price reduced from $22.37 to~~

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Set Screw #2D #4BK-#5B

$1.95 ~~Price reduced from $6.49 to~~

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T-2060 WN Tuned Pipe

$42.74 ~~Price reduced from $142.48 to~~

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O.S. Cylindr & Piston Assy OS Speed R21GT

$69.66 ~~Price reduced from $232.21 to~~

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Connecting Rod: 30VG

$27.48

Crankshaft: 25FX

$11.61 ~~Price reduced from $38.71 to~~

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Cylinder Head: GF30

$40.67 ~~Price reduced from $135.55 to~~

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Intake Manifold: FT-120 160

$13.27 ~~Price reduced from $44.22 to~~

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Crankcase: 21XR-B Version II

$21.46 ~~Price reduced from $71.54 to~~

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Crankcase: 21XZ-B Speed

$139.99

Cylinder & Piston: 12TR (P)-T

$75.99

Cylinder & Piston Assembly: 28XZ

$52.97 ~~Price reduced from $176.55 to~~

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Inner Head: speed 21XZ-B Spec III

$15.81 ~~Price reduced from $52.69 to~~

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Metering Needle 12F2: 12XZ Speed Spec

$5.74 ~~Price reduced from $19.14 to~~

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Carburetor Rotor: 70R, FS155A-P

$13.30 ~~Price reduced from $44.34 to~~

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Piston Pin; FS-62V

$3.57 ~~Price reduced from $11.91 to~~

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Piston Ring: FS30S

$7.87 ~~Price reduced from $26.24 to~~

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Rotor Stop #3A #2A

$6.49

Main Shaft: 5020-490 .40

$10.99

Pushrod: FR5

$3.26 ~~Price reduced from $10.86 to~~

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Carburetor Body: 61T, FS-62V

$11.68 ~~Price reduced from $38.95 to~~

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