All i can say is WOW! Almost done with the break in. On the 4th tank and started to get on it just a little. and yeah i have a taller tooth spur gear and i cant keep the tires on the ground on the concreate. this thing is sick. i cant wait till its all the way broken in. I would like to run with a stock 3.3 to see if this THS pipe is making a diffrence.