I just bought a beautiful cat-back tanabe medalion on ebay. I recieved the exhaust but no bolts for it, just the 3 pieces. I have a few questions . There are 7 bolts in total too put it on i was wondering if i could use my stock bolts.Other questions is, it is in good condition but the inside of the exhaust seems to have rusted within the pipes. I was wondering if this is a big deal. i have knocked alot of it out. My old stock exhaust seems to have rusted through and this tanabe is made better and stainless steel so it wont rust through. Just wondering if that affects performance at all.