Do flowmasters really suck lots of HP
06-12-2009, 11:57 AM
#1
Teching In
Thread Starter
Join Date: Apr 2009
Location: Minnesota
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Do flowmasters really suck lots of HP I want to get a new exhaust system for my car and currently have Hooker LT and cats and a Flowmaster cat back. The car dynoed out at 440 rwhp and when i opened the cut out in gained like 18 hp. I want to get away from the cut out and the cats. Was thinking of going with the Magnaflow set up but dont know if that will help or not. Like to keep it as stock looking as possible. Any input would be appreciated.
06-12-2009, 12:03 PM
#2
TECH Fanatic
iTrader: (6)
Join Date: May 2004
Location: Katy, Texas
Posts: 1,381
Likes: 0
Received 0 Likes
on
0 Posts
There is a reason Flowmaster has so many bad nicknames...slowmaster...chokemaster...
You have a cutout though so if you like the sound why not keep it? If you don't like the sound then of course get rid of it.
You have a cutout though so if you like the sound why not keep it? If you don't like the sound then of course get rid of it.
06-12-2009, 02:29 PM
#5
TECH Regular
iTrader: (6)
Join Date: Jan 2009
Location: Edmond, Ok
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
I want to get a new exhaust system for my car and currently have Hooker LT and cats and a Flowmaster cat back. The car dynoed out at 440 rwhp and when i opened the cut out in gained like 18 hp. I want to get away from the cut out and the cats. Was thinking of going with the Magnaflow set up but dont know if that will help or not. Like to keep it as stock looking as possible. Any input would be appreciated.
06-12-2009, 02:37 PM
#6
11 Second Club
iTrader: (3)
Join Date: Dec 2006
Location: Alabama
Posts: 879
Likes: 0
Received 0 Likes
on
0 Posts
I've PERSONALLY watched a car pick up 10 horses and 8 ft-lbs from simply cutting off the flowmaster and putting straight pipe on the car. Sounded like crap but gained power. As stated if you like the sound and have a cut out, you have the best of both worlds for you.
Trending Topics
06-12-2009, 03:10 PM
#8
Teching In
Thread Starter
Join Date: Apr 2009
Location: Minnesota
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
06-12-2009, 03:22 PM
#10
Teching In
Thread Starter
Join Date: Apr 2009
Location: Minnesota
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
06-12-2009, 03:39 PM
#12
If you like the sound of the flowmaster then get a mufflex 3 1/2 or 4" single system. It uses a single pipe over the axle through a big flwmaster and a single pipe out that dumps. It's mostly hidden on a camaro set up. It's the crossflow style mufflers that kill the power.
06-12-2009, 05:22 PM
#13
Launching!
Join Date: Apr 2006
Location: Back to Newport News
Posts: 213
Likes: 0
Received 0 Likes
on
0 Posts
What kind of exhaust setup do u have? I have Pacesetter LT's w/ their ORY and a 3" E-cutout. At low rpm's with the cutout open it sounded like ***. Then I got the Flowmaster merge welded in my ORY and it now sounds 10X better. No bullshit. I know yall are probably sick of everyone raving about the FM merge and all the hype about it, but it is DEFINATELY worth it as I cannot stress it enough to people. Trust me, I was skeptical at first before I ordered the merge, but I'm glad I did. It really made the cutout more "enjoyable" sounding when just puttin around town. Hope this helps.
06-12-2009, 06:31 PM
#14
Yes Hooker is very quiet stock but on H/C car it is loud. I get looks at stoplights idleing and it screams WOT
Magnaflow is only slightly quieter. Horsepower makes noise in these cars ... it is that simple
Especially in our case where everything goes through one muffler unless you do a custom setup. 
06-12-2009, 07:43 PM
#18
TECH Enthusiast
iTrader: (2)
Join Date: Oct 2008
Location: Florida
Posts: 586
Likes: 0
Received 0 Likes
on
0 Posts
I'm running Dynatech Supermaxx LT's and Corsa cat-backs with high flow cats, it's pretty quiet at idle, but screams at WOT. It's a pricey set up, but sounds great imo.
06-12-2009, 07:47 PM
#19
On The Tree
iTrader: (3)
Join Date: Jan 2009
Location: New York
Posts: 123
Likes: 0
Received 0 Likes
on
0 Posts
No I haven't had dual single chambers specifically, although I do currently have duals with a set of no-name chambered mufflers and they're a huge restriction. But I've seen far too many cars pick up more power when they got rid of their slowmasters. Also if I'm not mistaken, when the S-197 Mustangs first came out there were GT's that were LOSING horsepower over stock when they put the slowmaster catbacks on. After seeing all of these results I wouldn't even take one of their mufflers for free.