need the truth
Thread Starter
TECH Apprentice
Joined: Oct 2004
Posts: 361
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From: courps christi tx.
need the truth o.k. guys i want to know for sure, dose flowmaster realy flow less then other mufflers, or what, and if so what is a good flowing muffler that still has the deep muscle car sound like they do. i was thinking spintech.
TECH Senior Member
Joined: Jun 2003
Posts: 9,339
Likes: 3
From: NYC metro area
Yes it does flow worse than regular mufflers. But you won't really notice any power losses worth anything more than around 3 rwhp. It's when you start upgrading heads and valvetrain that you'll notice more of a loss. With a more powerful setup such as a stroker and/or forced induction, it will sap much more power.
The biggest downside IMO on the Flowmaster catbacks is that they aren't stainless steel. If you've got a bolt-on car, don't even worry about swapping yet, put your money to more useful mods anyway.
The biggest downside IMO on the Flowmaster catbacks is that they aren't stainless steel. If you've got a bolt-on car, don't even worry about swapping yet, put your money to more useful mods anyway.
Spintech mufflers sound very good, but the best sounding mufflers IMO are Dyno-Max Ultra Flo muffler...magnaflow and hooker have some nice sounds as well. The dyno-Max Ultra Flo's also flow very well.
Thread Starter
TECH Apprentice
Joined: Oct 2004
Posts: 361
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From: courps christi tx.
i do have a stroker motor, its a LT4 396, so are you all saying i should ditch the flowmaster. i know a guy that is selling a brand new hooker muffler for 40 bucks, but it is 4" inlet, and out. what do you all think
On The Tree
Joined: Oct 2003
Posts: 195
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From: Upstate NY
Originally Posted by chris77
o.k. guys i want to know for sure, dose flowmaster realy flow less then other mufflers, or what, and if so what is a good flowing muffler that still has the deep muscle car sound like they do. i was thinking spintech.
nothing a cut-out wont fix
id ditch the flowmaster if your running a 396, prolly choking off 15hp. Get something that flows alot, like a gmmg or somthing of that nature. There are too many baffles in flowmasters mufflers to flow nicely.
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Verdad Gallardo TECH Senior Member
Joined: Jun 2003
Posts: 9,339
Likes: 3
From: NYC metro area
Originally Posted by chris77
like i said i hear this all the time, but dose anyone have numbers to prove this.like dyno results or flowbench numbers
Now your talking...true duals is the way to go with a stroker. My setup that I am working on is a Hedman X pipe, Dyno-Max Ultra Flo's and turn downs by the axle. I can't wait to hear this thing pur. lol. A friend of mine has true duals with spintechs on his 383 86 Iroc, and that thing sounds pretty wicked as well. Another friend has a 83 Grand Prix with a weak 305, but he has true duals with Magnaflow mufflers, and I tell you what...that thing is slow, but damn it sounds MEAN.
Shane Burgess at Thunder Racing (check out their site, his car is the nicest one on there--the gray and maroon flames) said his Spintech was ****. He said it ranks up there with Flowmaster. I would try a Dynomax Bullet or something of the sort if you went with true duals like many here are recommending. If I could do it again I would do true duals.
Originally Posted by Brett95z
id ditch the flowmaster if your running a 396, prolly choking off 15hp. Get something that flows alot, like a gmmg or somthing of that nature. There are too many baffles in flowmasters mufflers to flow nicely.
TECH Senior Member
Joined: Jun 2003
Posts: 9,339
Likes: 3
From: NYC metro area
Originally Posted by Compstall
Mine's over 5 years old and still in great shape.
The flowmaster on my V6 is rusted out and it's only been 3 years.
Originally Posted by Compstall
Mine's over 5 years old and still in great shape.
, needs a little control. my brother has a 98 z and it used to have a magnaflow on there and sounded like junk and he got a 80 series flow and
sounds much much better.