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Another Muffler/exhaust question

1.4K views 23 replies 12 participants last post by  faym 08  
#1 ·
I've been a Flowmaster fan for many years. I have run nothing but Flowmasters on every V8 truck and car that I have owned usually a pair of 40 series as I love the sound. Well with the build up on my 05 GT I'm considering trying some new things just really undecided as to what. I've read several pages on this forum and others on Flowmasters, Magnaflows, Borla, etc. etc.

I'll admit, I love my cars loud and aggressive sounding. I do currently have 40 series Flow's on the car now, but after I get around to Cams, and headers within the next few months I think I wanna try something new just cant decide.

So what are you fellas running? Whats the general muffler of choice for these 3V 4.6's? something that is comparable to the 40 series loud aggressive sound. sound clips of your cars? reason? any help is appreciated.

JB
 
#2 ·
I have American Thunders and when I get a chance I'm going to give the Flowmaster Outlaws a shot. it's not your traditional Flow chambered muffler but a straight through design.
 
#4 ·
Interesting, I haven't seen those I'll take a look and read into them.

Another question. Do these cars (with a tune of course) like the off-road X-pipes? or should I stick with a catted X-pipe? I hear different things about back pressure and yadda yadda LOL

My 2002 Roush Stage 2 I had offroad X-pipes sounded awesome and didn't seem to miss the cats.
 
#3 ·
I'm running pypes violators with an offroad H and longtubes. Lots of peoppeople like x pipes but imo they sound like **** on half the setups people run. My advice, find a local mustang club, go to a track day, sonething like that and hear setups in person
 
#5 ·
If you don't need cats for emissions, I would ditch them. And I don't know what you've heard but backpressure is never good.
 
#6 ·
Thanks 07 Boss, I live in SC with no emissions testing, well unless a cop wants to really be a douche but I've never had a problem.
 
#20 ·
Corsas do sound sweet!

I'm running Mac lts a prochamber with cats welded in and roush/borla stingers, and I love it, car is loud, sounds mean but still actually has a nice tone. My best advice would be choose your mufflers to fit your final set up. I had flowmaster American thunders with my stock exhaust but I didn't like the sound after the lts and prochamber
I'll admit it - I'm a huge Mac fan. I also run Mac ceramic longtubes, ProChamber, and I *used to* run Magnaflow brand high-flow spun metallic substrate cats with it into Roush Extreme exhaust (which are resonators with new over axle pipes and a muffler-delete).

My advice to anyone when starting exhaust is to add the Roush extreme exhaust. It just sounds great. Next I'd add a Mac splice-in ProChamber...then long-tube headers.

There are many great header brands. American Racing and Kooks are probably the best, but Mac, StainlessSteel works, JBA, Pacesetter and others all make good headers for these cars.

Look into the Roush extremes for sure.
 
#8 ·
Corsas do sound amazing. Worth every penny when you're a poor college student? Nope, but most of you guys aren't poor college students ;)
 
#9 ·
I am running the Flowmaster American Thunder Cat Back system.
It sounds good in my opinion. Fairly loud and it does have some drone to it.
But, I like it!

I was thinking of going to SLP Loudmouths... But, I am still on the fence about it.
 
#11 ·
Loudmouths are not even loud unless you have an offroad pipe. Idk what some of you guys are on, I have never heard an axle back I considered too loud even muffler deletes. I want some flowmaster outlaws with my headers and offroad H but I'm saving my funds for struts, shocks, and lcas, then I figure with cams I'm getting my exhaust will be the perfect volume.
 
#13 ·
My problem is o/r h pipe + mac axle backs = too loud and no refined sound. Stock h pipe + mac axle backs = Great deep exhaust note but no volume. Can barely hear the cams lope. My car is sitting right now with no axle back at all and I'm still deciding what I want to do next. Wonder how much louder boom tubes are than the regular mac axle back? Sorry to hijack thread.
 
#14 ·
I'm running Mac lts a prochamber with cats welded in and roush/borla stingers, and I love it, car is loud, sounds mean but still actually has a nice tone. My best advice would be choose your mufflers to fit your final set up. I had flowmaster American thunders with my stock exhaust but I didn't like the sound after the lts and prochamber
 
#16 ·
Had the flowmaster series 40 and friend had 44s. They were identical. They were nice, very deep. But not throaty, just lots of bass. With an xpipe though it was drone hell. Like deep, incessant bass in your ears. couldn't hear the radio and constant BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB at all RPMs. Like someone playing tuba in your ears. That was on my 01 GT.

On my 06 GT, I have a Borla ATAK. Sounds ****in awesome. Just plain MEAN, throaty and deep.
that's not my car. It's a little "raspy" or bubbly at higher RPMS when letting off the gas but not much. It sounds great. There's a clip on youtube paired with kooks headers (sp?) and midpipe and it sounds great.
about $900 on american muscle for the catback.
 
#18 ·
lt's offroad H and pypes violators. Sounds nasty when I'm on it, zero drone.