THE KWI AO RR BASE CLUTCH KIT IS DESIGNED FOR THE 2020/2021 TURBO RR X3 195HP MODELS AT STOCK HP LEVELS OR WITH ANY TUNE OR FUEL THAT INCREASES BOOST/HP AND STILL USES THE OEM TURBO. THIS KIT COMES WITH A #4 CUT HELIX AND CANNOT USE THE OEM HELIX THAT CAME WITH YOUR VEHICLE. THE #4 CUT HELIX IS SPECIFICALLY DESIGNED TO STRAIGHTEN OUT THE SHIFT CURVE OF THE TURBO RR MOTOR WITH ITS LOWER COMPRESSION AND HIGHER BOOST LEVELS AND GIVE YOU EXCEPTIONAL ACCELERATION AND BACKSHIFTING. KWI AO KITS GIVE YOU A LARGER TUNING WINDOW AND MORE PERFORMANCE THAN ANY OTHER KIT ON THE MARKET- FROM SEA LEVEL TO 15000 FEET, FROM DUNES TO THE STREET... THIS KIT WILL WORK FOR YOU WITH NO COMPROMISES! THE AO KIT CONTAINS SPECIALLY DESIGNED AO WEIGHTS, 1 PRIMARY SPRING, #4 CUT HELIX, AND MAGNETS.