I have an exhaust leak in between my cat and my catback. The bolts connecting them are completely rusted over so they will need to be replaced. Does anyone know what size the studs are that connect the 2?

Also, I've been thinking of just getting a test pipe made to swap out the cat with. Anyone done this on their lancer and remember how much it costs?

 

I just did it on mine...I went to a local hardware store and got some bolts. I can't remember what size though. With the test pipe you are going to have to do a CEL eliminator trick or buy a CEL eliminator from RRM. I bought a hi flow cat/ test pipe look alike for like $70 and then had the flanges put on how I wanted them.

 

Thanks. I only have one car so I want to avoid destroying the bolts to figure out their size because then that would mean driving to the store with no exhaust :P