Hey guys, I was just wondering if I got a downpipe that gets rid of the cat, how do you make it so that the check engine light doesn't come on?

 

you do a search, haha.

https://mitsubishiforum.com/m_94383/tm.htm

But sometimes the CEL wont come on depending on how clean your car is running

 

Thanks TE, I knew that I saw that article somewhere!

 

so if I have a 2.5" cat back and I get a 3" downpipe what is the best way to make it fit?

 

anyone?

 

If I had your car in I would get everything 3 inches I believe you can do it from the turbo back. Replace your catback pipe with a 3 inch pipe, get rid of the cat with a 3inch straight pipe and work your way up. Correct me if im wrong but I'm pretty sure even if your runnin a 3 inch downpipe and your using a 2.5 inch catback it will just be like running with a 2.5 inch. Your smallest is what your car will use so just get 3inch pipes all the way. IMO

 

well I would but I already have a magnaflow cat back that is 2.5, I got it becuase I don't want it to be too loud and I know that research has shown that there aren't really any significant gains untill you are pushing about 400+ hp.