While home on leave I had a shop check out my exhaust and found out the previous owner put Flowmaster on. I've heard that they are the worst performing for our cars. Any truth to that? I mean, how bad is it?

 

I know there are plenty of catbacks out there that will make more power than a Blowmaster, but the main thing I hate about it is the sound. My car had one when I bought it and you could barely even tell it wasn't stock exhaust. I think the biggest factor when choosing an exhaust setup is wheter or not you like the sound. I don't think the power difference is really significant enough to be a concern. Just my opinion.

 

I think flowmasters sound good. I raced a friend of mine he had a flowmaster bolt on muffler, and a lid, all I had was the K&N FIPK. I ended up beating him by about a car and a half. I dunno if it was cause of the muffler or what but we did race about 3 times beat him every time.

 

Most people like the way they sound but they make little or no power over the stock exhaust.

 

Well let me put it this way. On my 1985 Z28 with a 305 TPI motor, I ran a 15.4 @ 88 mph on headers and dynomax muffler. Then i put on a flowmaster muffler, and in the same conditions I ran a 15.5 @ 87 mph. So basically the flowmaster owned my car pretty good.

 

Flowmaster 80 series,which are on are cars,are the 4th loudest muffler u can buy.???

 

there not bad exhaust there just not very performance oriented, they sound good for and everyday driver, but for performance cars no, they sound good there just not loud like everyone wants them to be but yes there are many better catbacks out there and i wouldn't go with flomaster, i had the 80 series on my trans am when i had headers custom Ypipe and zz4 cam and it sounded really good up top but to quite down below

 

Well today I was watching horsepower tv and they had a ls1 camaro ss they were building up. They put on a flowmaster catback exhaust along with a lid and some huge tb. The total for all of this was 960 some dollars. After dynoing the car they only dynoed 19 horsepower more over stock (300). After finding this out I wanted to run out side and rip off my flowmaster exhaust.
-Brandon

 

They are of good quality, it's just that they don't flow well. From my understanding, they barely out-flow (if not even worse) the factory muffler. When the majority of Flowmaster's mufflers were designed, sound was the primary thing they were after, not performance. With that being said, the Flowmaster 1 chambers flow very well. When I was building my true-dual system for me car, it was between those and the Dynomax Bullet mufflers. I chose the Bullets for their race-car sound over the 1 chamber's muscle car sound since the performance difference between the two would be very minute (with the Dynomax's coming out on top).

 

the pervious owner put one on my car too, and like someone said above, they arent performance minded mufflers at all... strictly sound.... The sound really good, but tahts about it.... cant wait for my TDs

 

thats where a cutout comes into play. if you run it open, then having a flowmaster muffler is ok. thats what i did when i had my crapmaster. now, i got a different muffler and an electric cutout.

 

Ive heard the 40 series flows decent, the other series (50, 60, 70 etc) dont flow very well.

 

80 series suck!! i picked up 14rwhp switching from 80 series to TSP Rumbler

 

I have a QTEC and must have picked up more than that AND I still get to hear my Flowmaster when I want. Mine is 6 years old,worn in,and sounds great.

 

Ive made up my mind and Im getting a Hooker muffler to replace my Flow....

 

To my understanding, Flowmaster is not really intended for LS1s. I used to have one on both my 68 firebird and on my 00 WS6. I noticed a frig'n huge diff though when I switched to SLP's LM. I've heard though that CAROSA(if you can still find em), Borla and MagnaFlow sound great with an LS1 if you want a throaty sound. But if you want something thats loud as hell and ****'s off your neighbors at 2am after hit'n the clubs,... go with SLP's LoudMouth.

 

is it possible to buy a corsa or a borla muffler by itself? without having to buy the full catback. if so, where?


sorry to jack the thread.

 

I used to run the flowmaster catback i liked the soudn but i wasnt doing it for me. so i dished out more money and got the slp loudmouth HUGE difference the loudmouth is mean and powerful and my car feels faster after the install

 

I had one on my old '89 IROC(5.0 A4), far from stock(all bolt ons) and it ran mid to low 14s. Its not my favorite muff, if I were to buy a muffler it would be a 40 3"X3" single. They sound great, had one on my '94 B4C car I had.

 

Mine picked up lower end torque from having the Loudmouth setup. My buddies really like the sound of it. I like the in car drown being eliminated, also the neighbors like the fact they can still be sleeping when I leave at six to go to work. Not really happen with the fit of the cat-back setup though and not a fan of the tips angle too. I would have gotten a magnaflow if had know the headaches of the fit and tips verus the extra $150 bucks.