Our cylinders come with a Lifetime Warranty against warping issues or plating defects. Our Hydro Rev Lifters come with a lifetime warranty. All other parts follow the manufacturer’s warranty and you will need to contact the manufacturer if issues arise.

If there are any questions on our warranty please contact us at 866-892-2109.

To return merchandise purchased from Revolution Performance that you believe or are instructed is covered by this warranty, see our Returns Policy page.

Revolution Performance LLC, hereafter referred to as Revolution, reserves the right to make changes in design, materials and specifications on products, engines and kits without incurring liability or obligation with respect to similar products previously manufactured or sold. Our R&D program never stops; improvements may be made at any time.

Revolution continually strives to provide products and services in support of racing and high performance, which reflect our reputation and ongoing efforts at improving the sport of motorcycling. Revolution warrants all parts manufactured by Revolution to be free from defects in design and workmanship. Should the parts be found to be, or become, defective during any stated warranty period, Revolution will, at its option, repair or replace any, or all, defective parts. Revolution will maintain no obligation under the terms of this warranty in the event the parts become defective as a result of improper assembly, installation, break-in, maintenance or use, or any other misuse or mistreatment of the parts including, without limitation, operation of the parts with fuels, oils or lubricants not conforming to specifications published by Revolution or continued operation of the parts after a defect or malfunction occurs, is identified or suspected. Revolution will have no obligation under this warranty for parts defective due to alteration including, but not limited to, chroming, polishing, powder coating, painting, removing and modifying components, shot peening, bead blasting, modification, repair or unauthorized service, even when such services or modifications may be performed by Revolution at the request of the end user.

All items not manufactured by Revolution are warranted to be free from defects under the terms outlined by the specific manufacturer. Any parts determined to be defective will be repaired or replaced, at the option of the manufacturer, in a prompt and just manner. Determination of obligation under the terms of this warranty will only be made once the components or assemblies have been received and inspected by Revolution or the third party component manufacturer.

• Any parts used in a racing application
• Any part that has been physically altered, improperly installed or maintained
• Any product used in improper applications, abused or not used in conjunction with the proper parts
• Any product that has been placed into, or continued in operation, without proper setup, to include but not limited to carburetor jetting, ignition timing or lubrication
• Any product that has been damaged by ingestion or introduction of foreign matter or objects through the intake, oiling system or other source.

All items sold, for installation by the end user, are considered by law to be customer assembled items and carry no liability to the distributor or maker. This warranty does not cover any consequential, incidental, or special damages arising out of the use of, or inability to use the parts, components or vehicle to which the parts or components are installed. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion may not apply to you.

Products sold and marketed by Revolution are intended primarily for racing or high performance use by experienced and skilled riders, which implies that these products will be pushed to severe and unusual limits. Revolution has no control over the installation and usage of these items and in no way can Revolution assume any liability or responsibility for damage or injury of any type resulting from their use. Revolution shall not be liable for any indirect or consequential damages whatsoever.

The words Harley-Davidson, Harley, H-D, Buell, Thunderstorm, Deuce, Screamin’ Eagle, Sportster, Evolution, Low Rider, Super Glide, Wide Glide, Dyna Glide, Softail, Heritage Softail, Electra Glide, Fat Bob, Fat Boy, Bad Boy, FL, FLH, FXR, FXRS, FX, FXE, FXS, FXWG, FXST, FLST, FXSTS, FLSTF, FLSTN, FXD, FXDB, FXDS, FXDWG, FLT, FLHT, FLHS, FLHR, XR, XL, XLH, XLX, 883 and others are registered trademarks of Harley-Davidson, Inc., and are used for reference only and are not intended to imply that these parts are manufactured or endorsed in any way by Harley-Davidson, Inc. Revolution is not affiliated in any way with Harley-Davidson, Inc., or The Harley-Davidson Motor Company.

Some performance modifications to original equipment carburetor, exhaust and/or engine components may not be legal for sale or use on pollution or noise controlled vehicles, except those used in closed-course competition. Check your federal & local laws before ordering.