O.S. Engines

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

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Inner Head: 21XZ-B Spec 2

$57.96

Gasket Head Aluminum, .2mm: 19XZ-B Speed

$5.31

Thermo Insulator, 11K: 18TM

$19.14

Gasket Head, .1 Brass: 21XZ-R

$6.49

Rear Adapter: 18TM

$19.05

Speed Flywheel Puller

$48.34

Outer Head O.S. Speed R2106

$124.99

Heat Sink Head: 91SX-H

$17.39 ~~Price reduced from $57.99 to~~

Clearance Sale! ⓘ

Motor Mount: 15LA

$22.26

Powerboost Pipe: III 50, 55HZ-H

$184.86

Bearing Rear: 65AX

$22.16

Rear Bearing: 108-160

$26.34

Cam Holder: Sirius 7

$48.41

Cam Cover: FS-40 Surpass

$9.44

Carburetor Screw: #103A2A

$6.49

Cover Plate: 56 FS

$15.76

Cover Plate: FS72 Alpha

$5.15 ~~Price reduced from $17.16 to~~

Clearance Sale! ⓘ

Cover Plate: 91SZ-H

$20.99

Crankcase: GGT10

$104.09

Crankshaft: 25AX

$43.99

Cylinder Head: FS81 Alpha

$76.86

Cylinder Head: FS155A-P

$114.61

Cylinder Head: GT15

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

Clearance Sale! ⓘ

Cylinder Jacket: IL-300 Dia-Star

$162.95