how much louder

[s281 saleen #230]

Well I’m going wit the h pipe and have borla exhaust.. My ? Is how much louder is h wit no cats opposed to high flow cats? have a friend that said he got high flow cats and could almost see right threw so can it really make that much of a difference. oh and which will be better for gas since its 3.31 here in nj which suckkssss. Good news is tho don’t care about emissions have a buddy that will pass it for me. So really only the loudness is my only concern. Thanks again guy’s u really are a big help.

[PureStang]

catless is going to be noticablly louder than catted...but i would prefer the catted cause it gives it more tone...and sinces u dont have any form of forced induction...the cats will give you some of that back pressure that the power adder would give if u went catless