i drive a 96 coupe and i've been having problems w/ my exhaust where the header meets the cat. they're connected w/ spring bolts. i have dc headers and stock cat. i recently replaced the gasket, bolts and springs and put them on myself. my problem is that after a few hours, it gets loose again. should i use a locking washer or thread lock or both or is there something else i should do?

 

I had a similar problem, I had to change my springs

 

he did change his springs.

 

They are locking nuts from the factory. Pick up a pair, tighten them to the proper torque specs, and it should be fine.

 

just got the car down and ended up using locking washers and thread loc. no problems so far. i also ended up taking the support bracket off for the 2nd half of the header...wasn't even bolted on or anything.