got the case relearn done today. got improved power in the low end. im short on gas at the moment so i didnt get to test second gear much but the random kr is still there. there isnt a cat on the car.. the guy who had it before me has a plethora of clamps and reducers and all kinds of funny crap from the downpipe back to the resonator. and it leaks pretty bad. i got a 3 incher on order. hopin thats whats causing it