Just had a cat-back exhaust done on my 14 stock mustang gt including x-pipe and outlaw mufflers, on my drive home the exhaust makes the radio obsolete so i regret it on that front being a convertible has anyone else made the switch to a cat-back exhaust and outlaw series mufflers? and a little help would be if anyone knows if the american thunder axle back will fit in place of the outlaw series i am thinking i might have hit the 120Db rating while driving and if anyone says there is no drone slap'em i will say the drone is bad i have the automatic and at 1500rpm it's ok but bad....people on cell phones hate me driving by them even with there windows up they are still yelling at me

 

I had a Roush on my F150 when I bought it I just nicknamed it DroneMaster since it was too Loud and had could not talk in the truck drone from 1700-2100 RPM. To me anything louder than a Touring Muffler is too loud for a vert but I am both Old and Deaf and have had straight piped Caterpillar and Cummins diesels in my ears for years.

 

yeah i was comparing sound clips on the internet and the sound clips are not real life they should not even include them, to me the outlaw and american thunder cat-back kits sounded similar but the parts store said they had the outlaw in stock and 2 weeks out for the american thunder kit and for 10 dollars in price difference i opted for the one in stock and had them install it what a mistake that was... the guy who installed it couldn't even line up the tail pipes properly and now i have to take it in and have them adjusted properly,guy said he spent 45 minutes on it but he had the car for 1.5hrs and when i confronted him about it he just said it was a really tight fit and it is what it is, needless to say i won't be back there but it looks like i backed into something and bent the muffler maybe i'll try my hand at it when i get a dry day so now i need a Db meter to see if i am in city limits i heard the cops where i live are cracking down on loud cars

 

You get what you pay for with exhaust. Buy Borla or Corsa.

 

Hi,
I'm not an expert on exhaust setups but would like to share opinions. That being said...

FLOWMASTER OUTLAW CAT-BACK EXHAUST SYSTEM
The straight-through design mufflers + straight (no resonators) OTA pipes + X-pipe. Yep, these are loud. But, I'm sure what's bothering you more is the cabin drone.

A general consensus on Flowmaster brand is the drone or at least that's what I remember reading. The truth I hear is, ALL aftermarket exhausts drone in some degree and simply a matter of how much noticeable. I doubt replacing to Flowmaster American Thunder Axle-Back would do any good with your (cat-back) setup. To reduce drone--> Resonator(s).

I auditioned both of the Outlaw AB & CB clips with my earphones on from AM website. Wow, these are some beast-roaring exhausts. Deep and Meaty. I'd say almost identical tone but the 'axle-back only' setup sounds more controlled.

Bent the mufflers?? That's not good... I believe aligning the tail pipes or axle-back tips has something to do with the fitment of OTA pipes. I've seen other brands difficult times fitting them correctly. I've had my resonators cut out and axle-backs won't line up evenly.

If you absolutely prefer Flowmaster's sound, then how about try axle-back only set up? This means putting back stock H-pipe and stock OTA pipes (with resonators). Otherwise, you might want to consider other brands such as CORSA.

 

thanks for replies but it was quite a difference from stock and outlaw....stock small little growl upon startup, and now its like a lion shakes the whole darn house.... family in basement suite were away this weekend wait till i fire it up when they get back... i liked the flowmaster sound on my sn95 did the cat-back on it but this is way louder then the american thunder setup i had on the 98...i guess i have to live with it was not cheap and didn't keep stock exhaust as i wasn't putting it on my leather seats as i don't have fold down seats in the convertible guess i am glad i didn't do the cat-delete or high flow cats and programmer because that would definitely open it up more than i did... guess i am just cautious about how loud is too loud,as they are ticketing harley's for after market exhaust and this falls into the harley range now....i guess i need to start acting my age of 49 and maybe just maybe my loud pipes will save lives

 

So the stock parts are gone. No worries. I see couple of options.

1. Run the current setup as long as you can. Enjoy the loudness.
2. If becomes too much, look into 'aftermarket resonators'.

- Here are some interesting reads.
Roush ab too quiet w/stock resonators and too loud w/out
replacing resonators with bullet mufflers?
Exhaust Opinion: Resonator replacements w/ bullet muffler

They're talking about using something like these:
Dynomax Race Bullet Muffler In/Out: 3"

Check the reviews, threads. I saw them mention Flowmasters.

I myself actually looked into doing this when my exhaust felt too much, although I ended up putting back the stock resonators.

 

well i was just informed,informally that the sound level in my jurisdiction is 83dBA.

- Motor vehicle exceed DBA level (collective noise level of engine and exhaust system) for a light duty vehicle is 83 DBA. mine was tested at 110 just funny when you roll up beside someone with their windows down and on cell phone and just stay beside them, i haven't been given the finger so many times as i have been in 1 day..

 

.
How was it tested & by who ?
If a sound level meter was used, did it have a current calibration sticker ?
Was it on or off axis, & how far from the car ?
.
.

 

I used the decibel meter on my iphone 7 plus from 5 feet away while i started the car and back it off the ramps car is going to be driven on a daily basis due to my other car breaking down so i need to tame it down as my neighbors have already asked me to tone it down

so this was taken from startup backed off the ramps ramps put away and shut off i think i am in the extreme catagory

 

in total the phone was on the ground approx 6 feet back center of car insanely loud even my brother in law works at a parts store saw this and went WOW could not believe the numbers said flowmaster said the only way to quiet it down was to put resonators on it, i think maybe look for stock mufflers or rousch mufflers and swap them out as long as they didn't weld them