S&S Cycle 100 Power Package Fits Harley-Davidson Twin Cam 88 1999-2006

S&S Cycle 100 Power Package Fits Harley-Davidson Twin Cam 88 1999-2006

Turn a stock Twin Cam 88 into a 100 cubic-inch performer with one bolt-in big-bore kit. The S&S Cycle 100 Power Package is a no-case-machining cylinder, piston, cam-chest, and oil-pump conversion that lifts a 1999-2006 Harley-Davidson Twin Cam 88 to 100, delivering the kind of mid-range pull and high-rpm reach that turns a touring bagger or a Dyna into a real road bike.

Key Features

• Complete 100 cubic-inch big-bore conversion kit, bolt-in with no case machining required
• S&S 4.000 inch big-bore cylinder set with cylinders that fit to piston without honing
• S&S forged piston kit matched to the big-bore cylinders
• S&S 585 Easy Start camshafts, available with the chain-drive configuration that retains the stock cam-chain tensioner or the gear-drive configuration that eliminates it
• S&S Quickee pushrods, S&S TC3 cam support plate, S&S TC3 oil pump for consistent oil pressure at the higher displacement, and S&S premium hydraulic tappets
• Available in the Silver cylinder finish or the Wrinkle Black cylinder finish
• Gaskets and seals required to complete the top-end and cam-chest installation are included

Technical Specifications

• Displacement: 100 cubic inches (from 88 ci stock)
• Bore: 4.000 inch (from 3.750 inch stock)
• Cylinder Set: S&S big-bore, Silver or Wrinkle Black powder-coat
• Pistons: S&S forged, matched to the big-bore cylinders
• Camshaft: S&S 585 Easy Start, chain-drive or gear-drive
• Pushrods: S&S Quickee
• Cam Support Plate: S&S TC3
• Oil Pump: S&S TC3
• Tappets: S&S premium hydraulic
• Country of Origin: United States

Fitment Notes

• Compatible with Harley-Davidson 1999-2006 Big Twin chassis fitted with the Twin Cam 88 engine across the Dyna, Softail, and Touring families.
• Excludes the 2006 Dyna, which used the early-style Twin Cam 96 crankcase with a different cam-chest configuration.
• The kit assumes a serviceable 1999-2006 Twin Cam 88 crankcase as the installation base; throttle body, intake, exhaust, and ECM tune are not included.
• The new 100 displacement requires an ECM calibration flash; a Dynojet Power Vision or equivalent tuner is the typical route.
• Refer to the Fitment tab for the full year and platform breakdown.
• Not affiliated with or endorsed by Harley-Davidson.