It raises the rpm and allows the tires and trans to be engaged faster and this elinates the honda bog in low gear.Clutches engage faster and allow tires to spin earlier and faster,Hard to explain but I rec alot due to the diff I saw going to 28 Zillas,The kit has excellent info on install(HL) and has stiffer springs and gaskets,must change oil and filter to install...... DO NOT ADJUST OR PLAY WITH CLUTCH ADJ SCREW WHEN INSTALLING KIT,MINE ENDED UP PERFECT AFTER KIT WAS DONE!!!!!!!!!! GOOD LUCK.........