High Flow Cat/ Test Pipe/ Stock Cat

[steve-o_585]

I really need help. My car wont pass inspection and it has a nasty exhaust leak. I have DC SS headers (Maybe 2.5") and Yonaka catback (2.25"), what size cat/ test pipe should I get? Not looking to spend over 100 on either, also If I get a high flow cat, should I have it welded on or flanged up?

 

[Cripton805]

What size collector do you have? Just get an OEM aftermarket one. Like pep boys or Aautozone.

 

[mjones73]

I'm assuming you need a cat to pass inspection so putting on a test pipe instead wouldn't help.

If you have stock diameter piping, look at the Magnaflow high flow cats, they sell bolt ins in for the non GSR models. Otherwise get the universal with the needed O2 bungs and get a shop to weld the need flanges on it for you.

 

[Samurai_Blue]

put on a stock header and a stock cat and you should pass. idk why you think a test pipe would help you pass smog