Harley-Davidson CVO ULTRA LIMITED Big Bore Kits
Genuine HD big bore kits and aftermarket alternatives that fit the CVO ULTRA LIMITED — all years. Select your year for exact fitment and pricing.
Genuine Harley-Davidson (4)
Genuine Harley-Davidson
3-7/8" Standard Bore Piston Kit
22144-08BGenuine Harley-Davidson
Screamin' Eagle 4-Inch Big Bore Conversion Kit
92500039Genuine Harley-Davidson
Big Bore Head Gasket Kit
16101-01Genuine Harley-Davidson
Screamin' Eagle MVA CNC Ported Cylinder Heads
16925-11Aftermarket alternatives
Aftermarket big bore kits that fit the CVO ULTRA LIMITED. Genuine Harley-Davidson is listed above, not here.
S&S
Piston Kit Big Bore 4.250" for M8 Models<br><ul><li>The Piston Kit Big Bore for M8 models is built for durability and consistent performance</li><li>These forged aluminum pistons are machined for precise tolerances, offering dependable compression and long service life</li><li>Designed with installability and reliability in mind, the kit supports routine maintenance and engine upgrades while helping maintain smooth operation under varied riding conditions</li></ul>
S&S
136" Big Bore Cylinder Kit<br><ul><li>Bolt on kit, the largest cylinder bore possible without requiring machining of crankcases</li><li>Includes MLS (multi-layered steel) head gaskets and cam cover badge</li><li>S&S stroker 4.625" flywheel required and is sold separately</li><li>Takes 107"/114"/117" to 136" displacement</li><li>Original engine serial numbers are retained</li><li>Retains stock engine height</li><li>Made in the USA</li></ul>
S&S
136" Big Bore Cylinder Kit<br><ul><li>Bolt on kit, the largest cylinder bore possible without requiring machining of crankcases</li><li>Includes MLS (multi-layered steel) head gaskets and cam cover badge</li><li>S&S stroker 4.625" flywheel required and is sold separately</li><li>Takes 107"/114"/117" to 136" displacement</li><li>Original engine serial numbers are retained</li><li>Retains stock engine height</li><li>Made in the USA</li></ul>
S&S
Big Bore Cylinder Kit<br><ul><li>Bolt-on without requiring machining of the crankcase</li><li>Original engine serial numbers are retained</li><li>MLS (multi-layered steel) head gaskets</li><li>Retains stock engine height</li><li>Includes cam cover badge</li><li>All necessary gaskets and hardware required for installation is included</li><li>Made in the USA</li></ul>
S&S
Big Bore Cylinder Kit<br><ul><li>Big Bore kit yields excellent results with stock cylinder heads</li><li>Easy installation no need to bore or split existing cases, just swap the cylinders (unless otherwise noted)</li><li>Cylinders are constructed from premium aluminum castings with cast-in iron liners</li><li>Kit includes cylinders, pistons, rings and gaskets (head, base and exhaust)</li><li>Made in the USA</li><li>Project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.</li></ul><br>Not recommended for trike models.
S&S
Cam Chest Kit for M8<br><ul><li>All parts in each kit are matched to ensure superior quality, fit, finish and performance</li><li>Oil pump and cam plate are precision-machined from billet aluminum with a blue anodized finish</li><li>Passage plugs removable for servicing</li><li>Independent scavenge sections for the flywheel cavity and cam chest</li><li>Debris screens in both scavenge pickups</li><li>Increased oil flow capacity on both the feed and scavenge sides</li><li>Adjustable Pressure Relief Valve is adjustable with unit installed in engine</li><li>Magnet in cam chest to help to stop debris from entering oil pump</li><li>S&S Quickee Pushrods with finished pushrod tubes</li><li>S&S premium tappets</li><li>Billet aluminum tappet cuffs have a hard-anodized black coating and are stronger than stock to eliminate distortion</li><li>Improved tappet stability in high-lift and high-rpm situations</li><li>Provides improved cam timing accuracy and eliminates the stock cam chain tensioner</li><li>Includes outer drive gears, all gaskets, bearings, and hardware required for a complete installation</li><li>Made in the USA</li></ul><br>550 cam is designed for big-bore applications. Kit Includes: • 550G Camshaft Kit • Quickee Pushrod Kit with Chrome Covers • Tappet Cuffs Lifter Guide • Spring Kit • Oil Pump with Cam Plate • Hydraulic Tappet Set.
S&S
BIG BORE KIT - M8 17-UP - 132/
S&S
BIG BORE KIT - M8 17-UP - 132/