Gen 5 with no muffler

[poptarts]

So a buddy of mine owns an exhaust shop. Says he can make something better and cheaper than corsa cat back. Will I throw cel if I run no muffler after cats? I'm all stock. I wanna make it sound better and louder.

So can I run straight pipe after my cats with no tune and not get cel?

[Simon930]

You will not get a CEL. The only way you will is if you get rid of the cats.