Just got done installing these babies on my stock h-pipe and I'm actually quite impressed. They weren't as loud as I was predicting (I assume because of the stock piping), but one thing I wasn't expecting was the increase in throttle response and high end acceleration. As soon as I pulled it off the pit, I got on the road and laid into first gear and the car put me in my seat... Something it wasn't capable of doing before as the engine is completely un-modified aside from a K&N air filter. So I continued driving it around and let it warm up to normal operating temperatures and it still moved just as quick. Figured it was maybe just in my head, so I let my buddy drive it as well, and he also said it felt alot more responsive. Anybody else had experience with these mufflers giving a noticeable performance increase? But anyway, back to the main point, I'd recommend these mufflers to anyone looking for something that isn't too high pitch as they are alot deeper than the standard 40's, but still have that 40 series growl around 2,000 - 2,500 RPM and at idle.
Just Installed Flowmaster Super 40's
- Thread starter Black98GT5spd
- Start date
40th GT
New Member
Nice!
I myself want to get some Flows and pair'em up with a O/R h-pipe and I have pretty high hopes for this..
I myself want to get some Flows and pair'em up with a O/R h-pipe and I have pretty high hopes for this..
streetstang03
unModerator
now just get an o/r xpipe 
it will open up the mufflers and get rid of that 'stuffy' sound they have when just welded in 
glad u like the flows 
it will open up the mufflers and get rid of that 'stuffy' sound they have when just welded in glad u like the flows 
69fb00GT
New Member
steelcitystang
New Member
How do you know that the Super 40s sound deeper than the regular 40s? Also, are your Super 40s the same length as the stock mufflers? How much did it cost you to have them installed? I'm thinking about doing the same.
I just did the mufflers on the stock exhaust system, so I bought the 2.25" OS inlet/OS outlet. But the strange thing was that the inlet and outlet were much larger than the stock piping. So we just cut four slots in the inlet/outlet, closed them down a bit, then welded them back up once we tacked the mufflers on. I bought the mufflers from partshopper.com at about $75 apiece and had them welded in by a good friend who owns a welding shop for free. I did call Meineke though, and they wanted like $100 - $150 for labor. Also the mufflers were about 2" - 3" shorter than the stock mufflers, but there was plenty of piping to play with. Just make sure you cut the factory mufflers as close as possible to the inlet and outlet. The total time it took us was about 2 hours. Probably could be done a bit quicker by someone who's performed this before or does this professionally. And I know they're deeper than the regular 40's because of the sound clips that www.mustangexhaust.com supplied. Great helpful site, by the way.
ironmedic
New Member
i cant find a super 40 sound clip anywhere! the flowmaster website doesnt tell me much when i listen to the clips cuz they are not on a stang. we need clips! 
