2K-Z28

I will be finishing my head/cam/headder/cold air swap tomorrow

Will I see more gains with loudmouth on or just y pipe? what would the difference be??

Thanks

WILWAXU

iTrader: (6)

Headers should have a y-pipe.

Keenov

iTrader: (5)

I don't fully understand the question you are asking, but the difference between a y pipe and a loudmouth catback is .. one is a catback and one is a y pipe

You will see a gain if you dump the catback, but you will not notice it. The loudmouth muffler is straight through iirc, so it will be very minimal. Just having a Y pipe hanging with no catback would be awkward though, just get some true duals if you want to do that.