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Old May 30, 2006 | 09:01 PM
  #1  
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Just put a replacement flowmaster muff on my 02 z28 not happy with performance, why.
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Old May 30, 2006 | 09:13 PM
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Flowmasters are really worthless other than the sound they put out. They are one of the most restrictive mufflers out there unless you go with the 1 chamber flow.
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Old May 30, 2006 | 09:13 PM
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because they dont flow as good as other mufflers in the first place, and the mufflers performance is barely, if at all noticable
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Old May 30, 2006 | 09:41 PM
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ok heres what u do to solve the problem....go get a manual cutout for 35$, get it welded on the I pipe before the muffler....so ur flowmaster wont go to waste bc they actually do sound good, but u can get that performance out of the cutout
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Old May 30, 2006 | 09:42 PM
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Originally Posted by staringback05
ok heres what u do to solve the problem....go get a manual cutout for 35$, get it welded on the I pipe before the muffler....so ur flowmaster wont go to waste bc they actually do sound good, but u can get that performance out of the cutout
thats a great low cost idea and you will tell the difference going that route.
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Old May 31, 2006 | 04:09 AM
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Who the **** puts a muffler on the car and expects performance..... ?
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Old May 31, 2006 | 05:07 AM
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Take off your stuff to "free" up power. You bottleneck it or restrict the flow in any way....you will show a likely decrease in performance.
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Old May 31, 2006 | 08:27 PM
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Originally Posted by fatnasty
Just put a replacement flowmaster muff on my 02 z28 not happy with performance, why.
I guess I need to clarify what I ment was it seemed to run better with stock exaust.
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Old May 31, 2006 | 09:07 PM
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Probably because all you got was a little more noise. The Flowmaster flows like crap; may as well be a stock muffler.

Not trying to be rude at all, but next time I'd suggest doing some research on here or other F-body sites before purchasing mods. It will save you money in the long run and you'll learn a thing or two in the process. Pretty much the only guys I know that run Flowmaster catbacks/mufflers on F-body cars are the ones that either:

A) Are rednecks and live way out in the middle of nowhere

or

B) Know nothing about their car besides that it's a Camaro/Trans Am and it's fast. They never do any research and don't know a damn thing about the car. "It's got uh V8, that's all uh know! The Mustangs all have it and it sounds real good, so I got it too."

I am by no means saying that you're either one of these kind of people, just saying that those are the only two types of people I've seen who will ever run Flowmaster on their F-bodies.
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Old May 31, 2006 | 10:02 PM
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I know there is supposed to be some kind of science behind the flowmaster design that is supposed to promote better scavenging. I personally don't see it, or maybe I'm too simple minded to understand it. But if you look at the internals of them there are a series of BAFFLES and CHAMBERS that your exhaust is FORCED to flow around and through. How can this possibly be a good thing, is my question. I know, I know, it's supposed to trick your engine into thinking the exhaust is bigger or some crap like that. All I have to say about that is .... BULLSHIT! I'll take my Ultraflows (which I can easily see straight through) anyday!
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Old May 31, 2006 | 11:07 PM
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Originally Posted by lilbuddy1587
Who the **** puts a muffler on the car and expects performance..... ?
for real. even a full catback is only really a sound thing. the 5-10hp you pick up on stock manifolds goes nearly unnoticed. it's like a tenth off your quarter. you may say you "feel" a difference after installation but that's a mental thing. if you were deaf and someone put a catback on your car without your knowledge, you probably wouldn't detect a thing.
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Old Jun 1, 2006 | 12:28 AM
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Originally Posted by fatnasty
I guess I need to clarify what I ment was it seemed to run better with stock exaust.
Honestly, it probably did. The crossflow Flowmaster mufflers suck
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Old Jun 1, 2006 | 12:37 AM
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Originally Posted by fatnasty
Just put a replacement flowmaster muff on my 02 z28 not happy with performance, why.
because you didnt use search
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Old Jun 1, 2006 | 12:43 AM
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Originally Posted by Full-Force
because you didnt use search
MUAHAHAHA Another newbie bites the dust
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Old Jun 1, 2006 | 12:46 AM
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I wasn't too happy when I installed my catback flowmaster. Thats why I'm having a cutout installed. When I rebuild my motor I'm going with longtubes and Holley afterburners like I had on my 83z28, there was a raunchous sound.
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Old Jun 1, 2006 | 11:04 AM
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Originally Posted by Scotty-Z
Probably because all you got was a little more noise. The Flowmaster flows like crap; may as well be a stock muffler.

Not trying to be rude at all, but next time I'd suggest doing some research on here or other F-body sites before purchasing mods. It will save you money in the long run and you'll learn a thing or two in the process. Pretty much the only guys I know that run Flowmaster catbacks/mufflers on F-body cars are the ones that either:

A) Are rednecks and live way out in the middle of nowhere

or

B) Know nothing about their car besides that it's a Camaro/Trans Am and it's fast. They never do any research and don't know a damn thing about the car. "It's got uh V8, that's all uh know! The Mustangs all have it and it sounds real good, so I got it too."

I am by no means saying that you're either one of these kind of people, just saying that those are the only two types of people I've seen who will ever run Flowmaster on their F-bodies.

neither applies to me............and my car is faster than yours


just kidding............mine was on the car when I bought her.. Sounds great but I DO have an electric cutout.
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Old Jun 1, 2006 | 11:33 AM
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Originally Posted by 2mffZ28
neither applies to me............and my car is faster than yours


just kidding............mine was on the car when I bought her.. Sounds great but I DO have an electric cutout.


Just stating my general experience with those who have it. I know that there are of course exceptions and people who will swear by it, but I think most of us know that the performance it gives is less than desirable. The cutout on your car was a good idea.
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Old Jun 1, 2006 | 12:04 PM
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before we start bashing flowmaster too much lets all agree were talking about the 80 series crossflow , other flowmasters flow very well but arent used on our cars unless in a TD setup .
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Old Jun 1, 2006 | 12:30 PM
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Yeah, any crossflow muffler is gonna eat some power simply due to having to send some of the exhaust 180* from where it's wanting to go. The Blowmaster unit is apparently the worst crossflow you can find.

But I'd love to hear an LS1 with TDs through a couple of Super 40s.
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Old Jun 1, 2006 | 12:34 PM
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I'm talkin about any of them. I'm sure some flow better than others but I don't believe in there design at all.
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