EcoboostDave

I have the FullRace catback without resonator, and I think it sounds great, in fact it is the best sounding and highest quality catback made. It has zero interior drone, but doesn't have as much turbo whistle as some of the 4" exhaust, but the 4" sound like s***. I gained some pretty good throttle response with the system to.

Fast Filly

iTrader: (1)

Do you have just the cat-back or do you have downpipes as well?

Joewee3.5

So 4" has more turbo whistle but sounds like s***? Here's the thing, idle-4000 rpm a good 4" will sound better than any 3" exhaust. Fuller and deeper. Over 4000 the rasp will show up on a 4". Some are more raspy than others. So 4" is good for some and 3" is good for others. Also there is a difference between interior resonance and interior exhaust volume. If you remove the resonator, volume will increase. Good luck.

05mustang_tt_charged

Installed my Kooks down pipe this afternoon. Very small increase in exhaust note at WOT, which was what I'm after and little increase in torque down low. I measured torque increase but the amount of wheel hop I'm getting where I didn't have any before.

EcoboostDave

That's just my opinion joe. I watched your video a few time, and its way to aggressive for me, but that's me. The FullRace has almost to rasp to it and has nice growl to it, but it doesn't have as much turbo whistle like yours which would be nice, but I just couldn't handle it being that loud as a DD. maybe I'm just getting old.

Joewee3.5

Mines still a little too loud in the cab. I bought the corsa because it supposedly knocks that interior resonance down. Well, it may do that but the interior sound is still up. Thanks for the compliments. Do you have any vids of yours?