These are simply the best! Want a starter that starts better, lasts longer and wont leave you stranded? Here you go! Nippondenso starters are assembled in the U.S.A. withheavy-duty components and tested withstate-of-the-art equipment Solenoid plunger, return damper and springs arereplaced with stronger components Clutch shaft and rollers are replaced with precision-groundand hardened parts for longer service life All components are assembled with a special lube that hasbeen formulated for starter roller clutch applications CNC-machined billet mounting noses are heldtogether with aerospace fasteners After assembly, all starters go to a dyno test including hi-lowvoltage, stall torque, solenoid engagement, amperage draw,load test, maximum rpm and motor impulse wave form Starters have a 4.4:1 gear reduction and produce 46%more cranking torque than the stock starter For maximum starting power we recommend using Terry Components 24k gold plated 99% electrolytic copper cables and/or a Noco lithium battery! Dont fall for the cheap knock offs and have to do the work twice! 1 Year warranty NOTE : 1.8kw starters will require a spacer block when used on 90-06 FLT models. On Softail, Dyna and FXR models, you must relocate oil lines and some wiring. 1.8kw starters are recommended for highly modified engines 1.4/1.5kw are recommended for stock or mildly built engines We recommend a jackshaft hardware and gasket kit for proper install!