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Flowmaster for ls1?

Old Sep 12, 2003 | 07:54 PM
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Default Flowmaster for ls1?

I have a 95 TA with flowmaster catback and love the sound. I just bought a 2000 TA WS6 and was wondering if the sound would be the same with ls1 as the lt1?
thanks
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Old Sep 12, 2003 | 08:03 PM
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Default Re: Flowmaster for ls1?

pretty much ya, umm, it sounds a tiny/tiny bit deeper on lt1's
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Old Sep 12, 2003 | 08:22 PM
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Default Re: Flowmaster for ls1?

i had it on my ls1 with sotck manifolds and Y and it sounded pretty good, at least to me. had a nice deep idle and rumble.

now that i got the LT's, custom Y, and magnaflows i know what better exhaust sounds like
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Old Sep 12, 2003 | 08:33 PM
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Default Re: Flowmaster for ls1?

where in san diego do you live btw. im in mira mesa
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Old Sep 12, 2003 | 09:07 PM
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Default Re: Flowmaster for ls1?

pretty much ya, umm, it sounds a tiny/tiny bit deeper on lt1's
It's more than just a "tiny" bit deeper on the LT1's. Trust me, it doesn't sound nearly as bassy/throaty on the LS1.

But I still personally think the Flowmaster sounds good on the LS1.

Mike
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Old Sep 12, 2003 | 11:38 PM
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Default Re: Flowmaster for ls1?

i would go with magnaflow over flowmaster without a doubt.
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Old Sep 13, 2003 | 12:43 AM
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From: Schiller Park, ILL Member: #317
Default Re: Flowmaster for ls1?

I've had many, many exhaust setups on my LS1 cars trying to find the "perfect" (to me) sound. I've tried both Magnaflow and Flowmaster (among others) and the Flowmaster sounds much better/louder/deeper. Magnaflow does flow better, but the sound just isn't there, IMO.

Bassani beats them both :p
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Old Sep 13, 2003 | 06:11 PM
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Default Re: Flowmaster for ls1?

I've had many, many exhaust setups on my LS1 cars trying to find the "perfect" (to me) sound. I've tried both Magnaflow and Flowmaster (among others) and the Flowmaster sounds much better/louder/deeper. Magnaflow does flow better, but the sound just isn't there, IMO.

Bassani beats them both :p
I agree Ryan, the Flowmaster sounds so much better(deeper/louder) than the Magnaflow IMO. I still don't know what all this hype about the Magnaflow is(although I'll admit it does flow a lot better than the Flowmaster).

But as far as cat-back systems/mufflers go, the GMMG beats them all.

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Old Sep 13, 2003 | 11:35 PM
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Default Re: Flowmaster for ls1?

GMMG is probably the best cat back out right now. Ryan, let these guys know exactly where it rasps at cause I dont know off hand and I know you do. Take it from someone that bought flowmaster: Dont buy it, you can get great sounds from better flowing cat backs. Flowmaster = Slowmaster
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Old Sep 14, 2003 | 12:39 AM
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Default Re: Flowmaster for ls1?

I had a flow and replaced it with a Magna Flow. It sounds much better and it makes much more power. I think the flowmaster is good for 4 RWHP and the MAgna is good for 15 to 20 RWHP. Sound much deeper and no rasp.
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Old Sep 14, 2003 | 12:49 AM
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Default Re: Flowmaster for ls1?

Flowmaster only rasps with an ORY, around the 2100-2500rpm range. It never rasped on my car when it was running through cats though.

Don't know how anyone can say that Magnaflow is deeper sounding than Flowmaster, I just flat out disagree with that statement. No arguement on the power gains though, Flowmaster probably makes the least power of any catback out there for these cars.

Personally, I wouldn't buy either the Flowmaster or the Magnaflow setups again. There are much better systems out there in both the low and high end price ranges...

But I've only tried about 10 or 15 different exhaust configurations on LS1s so what do I know? :p
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Old Sep 14, 2003 | 11:46 AM
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Default Re: Flowmaster for ls1?

where in san diego do you live btw. im in mira mesa
Chula Vista
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Old Sep 14, 2003 | 11:48 AM
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Default Re: Flowmaster for ls1?

thanks for all the feed back. i think ill look into the gmmg more before i do anything
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Old Sep 14, 2003 | 11:52 AM
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Default Re: Flowmaster for ls1?

Jrp, with california emissions, do you have trouble smogging with long tube and the other mods?
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Old Sep 14, 2003 | 05:13 PM
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Default Re: Flowmaster for ls1?

Flowmaster only rasps with an ORY, around the 2100-2500rpm range. It never rasped on my car when it was running through cats though.

Don't know how anyone can say that Magnaflow is deeper sounding than Flowmaster, I just flat out disagree with that statement. No arguement on the power gains though, Flowmaster probably makes the least power of any catback out there for these cars.

would you recommend gmmg?

Personally, I wouldn't buy either the Flowmaster or the Magnaflow setups again. There are much better systems out there in both the low and high end price ranges...

But I've only tried about 10 or 15 different exhaust configurations on LS1s so what do I know? :p
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Old Sep 14, 2003 | 05:28 PM
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From: Schiller Park, ILL Member: #317
Default Re: Flowmaster for ls1?

GMMG is a very high quality system that I think sounds great, looks good too. It seems to make power just fine from dynos I've seen.

But it's very pricy...
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Old Sep 14, 2003 | 06:19 PM
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Default Re: Flowmaster for ls1?

Well there is NO power gains through flowmaster, in fact, I think you loose power.
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Old Sep 14, 2003 | 07:21 PM
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Default Re: Flowmaster for ls1?

I agree that there is probably a good chance you will lose power with flowmaster
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Old Sep 14, 2003 | 07:58 PM
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Default Re: Flowmaster for ls1?

Flowmaster does not cost power over a stock base LS1 system. Hell, I've seen just the replacement 80 series Flowmaster muffler make 5hp gains, and the full 3" in dual 3" out system with mandrel bends is even better. Best gain I've seen from the American Thunder 53083 catback system for LS1 cars is 10rwhp on a stock Z28. Granted, many don't see even half that gain, but the point is it's not costing power.

It doesn't matter to me, I pulled my FM catback off long ago to move on to other systems, but I'd take it back ANYDAY over stock if those were my only two choices.

Flowmaster also has a very nice sound to it.
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Old Sep 15, 2003 | 03:52 AM
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Default Re: Flowmaster for ls1?

Jrp, with california emissions, do you have trouble smogging with long tube and the other mods?

well find out when its smog time :o. i just bought the car in july so its already smogged. when the time comes im gonna have to find a mod friendly shop or something. i dont know if my tr230 will pass and i know the long tubes wont pass visual.
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