O.S. Engines

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

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625-648 of 1,605 Results

Intake Manifold Assembly: FS-91 Surpass II

$29.49

Needle Valve Holder Assembly: 91SZ-H Hyper

$19.05

Pushrod Cover: FS-91 Surpass

$10.90

Pushrod Cover Assembly: FS72 Alpha

$3.54 ~~Price reduced from $11.80 to~~

Clearance Sale! ⓘ

Pushrod Cover Set: Sirius 7

$8.87 ~~Price reduced from $29.55 to~~

Clearance Sale! ⓘ

Piston: 70SZ-H

$48.51

Piston Ring: FS-70 SII

$29.49

Cover Plate Screws (10): 120AX

$9.85

Standoff 5x25.4mm 1" (4): GT55

$36.85

Valve Assembly Intake: FS-91 Surpass

$38.01

Woodruff Key: 61-91

$6.45

Rocker Arm Support Assembly: FS-20

$10.90

Crankcase: 46AXII

$52.73

Crankshaft: 15CV-A

$30.89

Cylinder Liner: FS-95V

$45.01

Cylinder Liner: 200 Surpass

$17.70 ~~Price reduced from $59.03 to~~

Clearance Sale! ⓘ

Gasket Exhaust: GT55

$7.46

M11 Header Pipe Nut: FS070S and FS91S II

$6.49

Muffler Mounting Screws #873 (2)

$6.49

Needle Valve Holder Assembly #61B: 91HZ

$11.80

Piston: 200 Surpass

$57.96

Prop Washer: 40-61

$6.49

Rocker Support: FS110A

$8.88 ~~Price reduced from $29.60 to~~

Clearance Sale! ⓘ

Valve Spring Retainer: FS-70SII

$6.49