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- 91” engines have 3-5/8” stroke with a 4” bore. Cylinder length is stock so engine fits in all frames with little or no modification. Compression ratio is 9.5:1
- 100” engine has 4” stroke with a 4” bore. Cylinder length is .260” taller than stock. The 100” engine will generally fit in stock frames with no modification. Compression ratio is 10.3:1
- Crankcases have 86-90 (4-speed) style cam geometry, 91-Up (5-speed) style drive side and are available only in natural aluminum finish. Primary components, charging system, ignition system, oil pump and transmission components are not included
- All engines are natural aluminum finish and are only available assembled
- Includes S&S® oil filter, 4 quarts of Mobil 1 motor oil and spark plugs
- Special Order Only
Includes:- S&S® special application crankcases
- S&S® Super Stock® cylinder heads
- S&S® cylinders and pistons
- Flywheels - balanced and assembled
- Supreme rods
- Pinion and sprocket shaft
- S&S® 555 cams in 91” and 600 camshaft set in 100”
- Gear case components
- Adjustable pushrods and pushrod cover assemblies
- Hydraulic tappets and tappet guides
- Super G carburetor kit
- S&S® roller style rocker arms and shafts
- S&S® billet gearcover kit
- S&S® billet aluminum rocker covers
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