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Moroso spiral flow mufflers

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Old 01-10-2003 | 05:09 AM
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1990GTA's Avatar
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From: Orlando,Fl. USA
Car: 1990 GTA
Engine: 5.7 T.P.I.
Transmission: 700r4
Axle/Gears: 3:23
Moroso spiral flow mufflers

Has anyone ever used these or know anyone who has? I am installing long tube headers and want to just run a piece of pipe back to a small diameter muffler (4 inch ) under the back seats. I was looking at the Dyno-max bullet mufflers also .
Old 01-10-2003 | 08:21 AM
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Momar's Avatar
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From: Decatur, Illinois
Out of curiosity which headers do you plan on using, and what diameter of pipe are you going to run back?

Ben
Old 01-10-2003 | 09:29 AM
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86 IROC's Avatar
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From: FL
Car: 1991 Z28 - 2000 Z28
Engine: L98 - LS4
Transmission: 700R4 - 4L60E
Axle/Gears: 3.23's - 3.73's
Right before I got my liscense, my dad had a 69' SS396 Camaro. It had a mild 454 w/ LT's and those Moroso mufflers. It wasn't overly loud, had a decent tone to them. From a performance standpoint... your guess is as good as mine. The dyno don't lie - so that's the only real way to evaluate them.
Old 01-10-2003 | 11:59 AM
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1990GTA's Avatar
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From: Orlando,Fl. USA
Car: 1990 GTA
Engine: 5.7 T.P.I.
Transmission: 700r4
Axle/Gears: 3:23
The headers are Hedman with 3" collectors, I was going to use 3" pipe. I didn't think the Moroso's would be as loud as the Bullet mufflers. I think I will give them a try. For a TA, my car doesn't sit real low so I believe clearance shouldn't be much of an issue.
Old 01-10-2003 | 02:41 PM
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Well, you are going to pretty much have to run under the subframe so measure around 3-3.5 inches from the subframe and that will be about how low your exhaust will have to be. Also one problem you may run into is that I dont know that you can get the s extensions in 3" so you may have to have the pipe custom bent down around the subframe which will not be cheap.

Ben
Old 01-10-2003 | 04:11 PM
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1990GTA's Avatar
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From: Orlando,Fl. USA
Car: 1990 GTA
Engine: 5.7 T.P.I.
Transmission: 700r4
Axle/Gears: 3:23
If I get the S extentions in 2.5" would that be pretty much a bolt on setup ? Do you know how long the extentions are ? The Spiral Flow mufflers come in 2.5" also.
Old 01-10-2003 | 05:42 PM
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Yes, they will bolt directly to your headers. I have one right in front of me and I would guess that its about 1.5 feet.

Ben
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