Topic: muffler for an 03 mustang gt

[dylanmassengill]

What is the best sounding flowmaster muffler i can get for a 2003 mustang gt?

[Soaring]

40 series I think.  Go to the classic section and click on FAQ at the top.  Scroll down a little and you- will see several sound bites of various mufflers. 

[rmodel65]

before you  settle on flowmaster for you 4.6 car take a look at SLP mufflers they are sexy when paired with the modular motors

i also see your from GA make sure to check out www.georgiacarry.org 

[nick6204]

slp is a very good exhaust i will not lie but to me go with the flowmaster super 44s cant go rong check them out on you tube i have them on my 99 gt

[rmodel65]

ive got flows on my 5oh but theres just something about the SLP and if iirc they make more powah than the flows

[Soaring]

ive got flows on my 5oh but theres just something about the SLP and if iirc they make more powah than the flows

More power by adding a particular muffler?  You've got to be kidding. 

[rmodel65]

there is a difference is small maybe .5-1

but every bit counts

[crzylx]

I'm a big fan of the 40 series my self.

I always tell people - make a decision on the exhaust based on how your going to be driving the car.

If your driving the car back and fourth to work everyday 40 miles each way... Flowmaster may not be the best option, as the drone can annoy you after awhile.

Than Corsa's RSC technology becomes a great option.

If it's a car that you could careless about drone, noise etc... Than you have a ton of options

Your best option is to just browse YouTube etc. and find which sound you like the best.


Don't be scared of Flowmasters and "losing" power. Never seen it, I actually ran  a dyno test between Flowmasters and Magnaflow's on the same car @ 450 RWHP. Car made the exact same horsepower, give or take 1 HP. With the amount of variables, I'd say there is very little difference.

All the 2 1/2" Cat-Backs seems to make the same power.

[rdrohio]

HI   I just purchased a o3 mustang gt convertible this makes the5th on I've had , What I am trying to find out is can I put 09 gt mufflers on my 03.

[Soaring]

Anything is possible.  Take some measurements to see if you have to alter the 03 any.  I wouldn't think there would be any difference.  My 03 Mach has lots of room around the stock mufflers to add just about any muffler I wish. 

[Pacman131]

I second the 40 series, best sounding and best flowing I think.

[Mach1EH]

BORLAs are pure EAR CANDY.

I have them on both of my 2003's.  (GT and Mach1)

JUST LOVE IT.

(just noticed this is a pretty old thread.  What did you actually go for?)

[Soaring]

I've been hearing the Borla's sound good.  Any sound clips of the Borla's on a modern car? 

[Mach1EH]

I've been hearing the Borla's sound good.  Any sound clips of the Borla's on a modern car? 

I've been meaning to do that, but feel that the conversion (to 0 & 1s - digitalized) the experience will be lost.
Nothing like 1st hand listening. 
Right now all covered up under their respective blankie (covers) for the winter.  May awake my convertible this w/e, if so I'll try to grab a vid with the camera.

[BlackShadow]

We have Borla on the 06, I don't like the drone which occurs around 2000rpm very hard to have a conversation at the 2000 mark, below or above 2000rpm all is fine. But all in all they have a very aggressive sound which I like alot....hehehe. Just don't talk to me until I'm up to speed  haha

[Soaring]

Yea, you don't need to be talking in the car while getting up to speed anyway.   Just turn up the C&W station, keep  your mouth shut,  and enjoy the ride.