Pontiac GTO 2004-2006 The Modern Goat

best catback exhaust?

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Old 06-20-2008, 09:23 AM
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Default best catback exhaust?

is SLP loudmouth any good? what is the best exhaust for performance and sound?
Old 06-20-2008, 11:31 AM
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Corsa extreme!!!! Sounds Nasty.........
Old 06-20-2008, 11:38 AM
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I have tried many different ones. Corsa Sport or Touring wins hands down! They have some of the best flow numbers and great sound. If you want flow with little sound buy magnaflow.
Old 06-20-2008, 01:12 PM
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gm offers a corsa kit, is this the same kit as the sport you are talking about. i want a loud exhaust.
Old 06-20-2008, 02:15 PM
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http://marylandspeed.com/pontiac-gto...-c-58_106.html
Old 06-23-2008, 01:27 AM
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Originally Posted by ArklaTexan
I have tried many different ones. Corsa Sport or Touring wins hands down! They have some of the best flow numbers and great sound. If you want flow with little sound buy magnaflow.
Where did you get your numbers? The mufflers flow identical CFM and both use the same diameter pipe.
Old 06-23-2008, 08:32 AM
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Originally Posted by oxidizr
Where did you get your numbers? The mufflers flow identical CFM and both use the same diameter pipe.
Re read my post. I said corsa as SOME of the best flow numbers. When you compare magnaflow to corsa it is about the sound.
Old 06-23-2008, 12:06 PM
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I think the GTO exhaust (as with the intakes) is all about whichever one will make you feel all giddy inside. There isn't much difference and most are still stock size diameter.
Old 06-23-2008, 12:08 PM
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Click on my fquick in my sig. It has some clips of my car w/ kooks headers and a corsa sport.
Old 06-23-2008, 12:20 PM
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im gonna go with slp loudmouth 1
Old 06-25-2008, 07:30 PM
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how much louder are the exhaust kits then stock? the stock exhaust is very quiet. also will an intake make the car louder?
Old 06-25-2008, 11:46 PM
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LM1 on stock GTO sounds great
LM1 with LT headers is raspy
LM2 with LT headers is not as raspy
LM2 with my set up is NASTY!!!!!!!!!!

SLP FTMFW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! one
Old 06-26-2008, 12:04 AM
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Magnaflow makes a good catback that is not to loud.

If you want loud I would do that catback with a cutout (maybe two).
Old 06-26-2008, 12:47 AM
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Spintech......sounds great and its affordable
Old 06-27-2008, 11:30 AM
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I have the SAP mufflers (Mangaflows) with an H pipe with SW headers and cam. its quiet cursing but when i get on its loud as hell.
Old 06-27-2008, 07:43 PM
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Magnaflow or Bassani.
Old 06-27-2008, 10:48 PM
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i have a magnaflow on mine. its not loud but sounds good under WOT. im betting it would sound better with LTs.
Old 06-29-2008, 10:57 PM
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Heres a video and sound clip of my car..

exhaust setup
jba shorties
jba catless mids
flowmaster thunder set-up

I have a slp tune to take care of the o2 sensors and no popping noises in the exhaust when i down shift!!

sounds pretty good to me..what do you guys think
enjoy!

http://myspacetv.com/index.cfm?fusea...deoid=35837568
Old 07-01-2008, 06:12 AM
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Got the Corsa sport behind catless mids and Kooks 1 7/8 LT's. Sounded awsome the day I put it on. And it still sounds awsome with over 500 crank horse power.
Old 07-01-2008, 09:39 AM
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Corsa sports sound great but cost alot of $$$$


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