UPGRADE PRIMARY CLUTCH FOR ALL 2016 and up CAN-AM DEFENDER HD9, HD10 MODELS READY TO BOLT ON AND GO! COMES PRE TUNED WITH WEIGHTS, SPRINGS ALREADY IN IT! UPGRADED FROM OE STYLE ONE YEAR WARRANTY BACKED BY HARVEYS ATV PARTS! This clutch was made using the stronger Maverick X3 parts but then modified to make it bolt up and work on a Defender HD10! What you have now is a ready-to-bolt and use primary clutch rated for more than double the HP of the original Defender HD9 & HD10 clutch! Some upgraded parts include that it has the reinforced towers with the steel-plated slides to prevent button wear on the aluminum housing. It also has the stronger X3 style top cover (aka Governor cup assembly). The great news is, even though it's a lot tougher than the original HD8 clutch, we have it pre-tuned for the Defender HD10 ( and 2021-2023 HD9). This upgrade also lets the engine rev up a little higher to areas that unlock more of your mid range - full throttle torque and power. The mid throttle rpm's are approximately 400 rpms higher while full throttle, this clutch is tuned 600-800 rpms higher than stock until you exceed 55 mph. Once you exceed 55 mph, the top end is the same as the OEM primary which was 7200-7500 rpms. It comes ready to bolt on and use on your Defender! The new weights and spring are already in it and is 100% complete, ready to bolt on and use! All of our clutches come backed by Harvey's ATV Parts no exceptions 1-year warranty at no extra charge. FITMENT: ALL 2016-2023 CAN-AM DEFENDER HD10 models and 2021-2023 Defender HD9. FITS ALL PACKAGES on both including, XMR, MAX, PRO, DPS AND XT.