Big Bore & Performance Kits

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"S&S Cycle 106"" Big Bore Kit At 3.927? bore, these cylinders have the largest bore that S&S feels can safely ... ...more
Black powdercoated. Fits: Harley Davidson Big Twin Models 2007up. SPECIAL NOTES:SS highly recommends installing a performance cam for easier starting ... ...more
Black powdercoated. Fits: Harley Davidson Big Twin Models 19992006. SPECIAL NOTES:SS highly recommends installing a performance cam for easier starting ... ...more
Upgrade your 883 or 1100 XL to a blistering 1200cc with this Big Bore kit. It comes ready to install ... ...more
Price $206.99
"S&S Cycle 97"" Big Bore Kit The 97"" Big Bore kit for 88"" motors yield excellent results with stock cylinder heads ... ...more
The 106 in. Big Bore kits yield excellent results with stock cylinder heads. Feature the largest bore (3.927 in.) that ... ...more
Price $789.95
The 106 in. Big Bore kits yield excellent results with stock cylinder heads. Feature the largest bore (3.927 in.) that ... ...more
Price $789.95
Motion Pro Throttle Cable for Athena Hyper Race Big Bore Kits For use with the Athena Hyper Race 70cc Big ... ...more
The 97 in. Big Bore kits for 88 in. motors yield excellent results with stock cylinder heads. Feature the largest ... ...more
Price $789.95
Revolution Performance Bolt-On Big Bore Kit. Revolution aerospace-grade all-aluminum cylinders with nickel-silicon-carbide electroplated bores which means NO SLEEVING; allows larger ... ...more
 
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