HOT ROD SED SHOP INC DUAL RATE FRONT SPRING KIT for Ski-doo 2008-2017 MXZ REV XP & XS CHASSIS 2 stroke sleds with 2" diameter front shocks and 42" ski stance. This is a more aggressive, stiffer than stock, front dual rate spring kit that works really well with stock shock valving and is a quick install. Stop the body roll and mushy bottoming front end on your sled with these top quality dual rate spring kits. This kit still offers a smooth plush ride but has a stiffer rate as they are compressed more keeping the body roll and bottoming at a minimum while offering a smooth ride. These are top quality USA made kits powder coated black.