i was wondering if anyone had to put the stock cats back on? i have invidia test pipes and invidia exhaust and something doesnt sound right. it sounds like a leak but no one can find it, its def coming from driver side around the header cat area. so i want to put the stock cats on and see if this goes away and my problem at hand is the two "pre stripped" bolts from the factory i cant get them out to re-install. does anyone have any pointers? thanks guys

 

torch and wax always works

 

pb blaster and a couple of hours....