Exhaust
 

What exhaust should i put on my 2007 gt for most hp increase? i love the pitch of the mustang, so a louder deeper throatyer sound would be great.

YouTube will be your friend here. Axle backs are common upgrade on the 05+ cars. My buddy nailed 12s with stock exhaust on his 2006 GT so it can't be that restrictive lol

Yea, the exhaust on the '05 to current are way better then the previous years..... larger diameter piping, and less restrictions. If anything, the axleback exhaust will be up to your sound preference. If anything is gained, it will be very little, but the smile is worth it LOL!

I like the sound of the Hooker Aerochamber axle back. IMO stay away from Magnaflow as it doesn't sound much different than stock. I drove a 2010 for a few months with Flowmaster and it sounded ok.

I don't actually mind the sound of the pipes axleback in my friends 05 GT. Sounds means.

Depends how much you want to change. You won't see much HP increase unless you go with headers. If you want a deeper sound the Mac offroad Prochambers will help.

i haave looked into a roush extreme performace catback system and flowmaster american thunder catback system the roush sounded way better to me. i wass told they will do like 5 hp their way. how much will headers add? i have roush cold air intake and plan on doing sct sf3/x3 tuner, throttle body, 3.73 gears, and a exhaust.

I'd get the tuner 1st since you'll need it for most of your mods. Get yourself an intake that requires a tune. Don't waste you money on a throttle body. The stocker is more than capable of handling what you want to do.

i was going to get it all at the same time? i already have the roush intake so i am not about to buy another one? and i was told the throttle body would add another 15 hp plus what ever the tuner does??????

if you want loud and aggressive rumble,try the mac axle back,i guarantee you will turn heads lol

Everything I have read online has said that the throttle body doesn't give you more power.

I don't know who told you 15 hp. Everything I seen on a throttle body change is no real gain, but its your $. Did your Roush intake requires a tune? If not its not flowing much more than the stock intake.

To give you some idea....I did Steeda CAI, Underdrive pulley, BBK TB, Bassani x-pipe with hf cats and Bassani axle backs on my 06 GT. It was then dyno tuned and I got a total of 69 hp. If you add up all the advertised gains from each individual mod I would have gotten over 100 hp, but it doesn't work that way.

^^ Yes that's a common misconception people have about mods, they see all the individual hp #'s for each mod, and add them up, and then they are disappointed when the final numbers come in. I will say though, that everything I've heard and researched shows that the TB is great addition for getting the most out of other mods.