http://www.americanmuscle.com/flowma...ck-0510gt.html
How do you like them? How long have you had them? Any drone at cruising speed??
Thanks for your input

 

I like them just fine. I think I've had them about 9 months or so. Not overly loud. Deeper sounding than factory. Only slightly louder than stock. They are actually pretty quiet at cruising speeds. No drone that I ever heard. I actually wish they were louder sometimes but it's probably better that they aren't so that I can avoid 'the man'. ;-)

 

Oh, one issue I do have is that the hangers are a bit off center. I haven't done it yet but I'm going to need to have an exhaust shop cut off the hangers and re-weld them for center alignment.

 

Glenn,

The Flowmaster American Thunder axle back exhaust system, with it's patented 60 Series Delta Flow chambered mufflers will improve your Mustangs exhaust flow for an increase in power and a throatier exhaust note.

The great benefit to Flowmaster exhaust parts is they give you that "old school" American Muscle rumble and They've perfected this system to have minimal drone.

I'm confident you'll be very happy with this set up. Let me know if I can be of any assistance!

- Dan

 

Glenn,

We sell a ton of these Flowmaster Thunder axle-backs! Most of our customers seem to be very happy with the sound quality, probably because Flowmasters give a nice deep tone that doesn't get too loud. I've driven our '06 GT with these and a Pypes O/R Xpipe and heard minimum drone. Plus, you figure that's with no cats, which usually causes drone on any axle back. Personally, I love the setup and think most Mustang Enthusiasts would agree.

Although, aftermarket exhaust is something each person likes to tweak to their liking. Listen to as many as you can in person and pick that way. It's hard to get a good impression from online videos sometimes. Good luck on your decision and let me know if there's anything I can help with!

Shane

 

I ran those (60 series) for 5 years with a stock H and there was no drone at all. It's just the box shaped 40 series that drone.

 

I have also installed. And I am very satisfied. No drone on the Autobahn. (stock H) My SLP's were too loud. And the standard too low. These are a good choice if you prefer something more discreet.
(a drawback: after 1000 km peels off the paint)

 

Yea I have em. The drone is gonna depend on what else you have going on as far as exhaust components. When I only had the ABs, it droned when it was under a load at lower speed in a higher gear. Now with the long tubes there is no drone at all

 

10% discount??

 

I have the "box type" 40s on mine and like stated earlier, in higher gear under load it does have drone but at wide open or in lower gears it is just insane fun.

 

I have an axleback set on my '10 GT. I get lots of positive comments on how good my car sounds. Same experience here on the drone. I paid a little more for stainless steel.

 

One of the first mods I did to my 06 in 2006 was this Flowmaster axle back (might have been 40's). Sound was cool, no drone, a bit louder than stock. I loved them...until I spent some time at open track days (road courses).

Then I felt it was still too quiet.

I then swapped in a set of PYPES Muffler Deletes and sold the Flows.