DO IT!!! The Heff is much throatier at idle, and it absolutely roars at WOT. But it's not THAT much louder below 3000 RPM. Nevertheless, it has a MUCH better timbre. I know I love mine!!!
Just do it. It's great!!! I think that there's a exhaust comparison thread on here or on youtube comparing all the different sounds. Lots of good ones. It's my opinion that ALL the aftermarket ones sound better than the stock, which does sound pretty darn great if you haven't heard an aftermarket one.
To my ear, the Heff sounds fantastic. Plus those tips sure do look good. :thumbsup
That's a tough question to answer for someone else. I have the Heffner cat back on my GT and love it. It is significantly louder than stock and I would guess I wouldn't pass one of those noise inspections we are lucky enough to have in California. The Heffner has a deeper sound than some of the others. I believe there is a thread on these somewhere with sound clips. In any case I highly recommend the Heffner but it is much louder.
if you dont set off every single car alarm when driving in a parking lot its not loud enough:biggrin
Ralphie's GT comes to mind, my ears are still ringing.
I have a nearly new Accufab X-Pipe I might sell you. I want straight race headers The X-Pipe is louder than stock when standing on it but pretty quiet when just cruising.
Might wanna listen to one that has those first. They are VERY VERY loud. Lots of drone in the car with those and in my personal opinion makes the car less enjoyable to drive.
+1 that is one LOUD beast. Was around it quite a few times @ TWS at WOT. Very loud.
Loudest of the weekend, though, had to be "Peak's" matte black one, the turbos were the only muffler....
Does the racing system collector style muffler knock the edge off Shelby? Do header systems for the GT in general have issues with leakage? Thx