Exhaust change to Invidia
 

Hey, I want to buy the exhaust pipes from invidia...

However, law says we have to have a catted front pipe. Anyways, is it going to restrict if I buy 2.5" over pipe and catalyst-back exhaust without buying front pipe?

I know it will restrict the air flow, but what will happen more?

tbh, you probably won't see much gains from it. probably around 5 WHP at the most, if at all. the most gains you will get is with an aftermarket header, especially with a tune.

there is nothing to do with catalytic converter with any exhaust. you're not changing front pipe.

I know, I am asking if I change every pipe except for the front pipe will it unbalance air flow?

No

I currently have the Invidia N1 w/ rest of the piping stock. Too quiet for me. Much louder than stock, but still quiet (imho). I have a Berk Catted Front Pipe in the garage, and I just purchased 1320performance UEL headers / tanabe OP and will have all 3 additional pieces installed within the month. I'll be sure to take a before/after.

Thank you. Perfect answer


hahaha, we will see. My items are shipped so I am waiting, but I will only install in winter.