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Old 04-22-2015   #1
redcobaltss
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Join Date: Apr 2015
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Need a new exhaust

Hi all I have a 89 stock dual cat exhaust. I'm looking for a cat back system that will bolt right up to the stock Y-Pipe. I ordered the magnaflow 3" cat back but wont connect with the pieces supplied. Any help would be great.
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Old 04-24-2015   #2
90 L98 TransAm
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Join Date: Mar 2006
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Re: Need a new exhaust

Here's what I did with my Magnaflow #16829 cat back. have had no problems with it:

http://www.gtasourcepage.com/forum/s...ad.php?t=51761
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Vortech V-3 SC, 11+ psi boost
0 - 60 in 5.40 Seconds
1/4 mile in 13.9 seconds @ 103 mph @ 5,000' elevation, 309 HP (per Escort GT-2 meter)
Shift kit, 9 clutch 3/4, Corvette servo
Magnaflow 16829 catback exhaust
TDS fr. sway bar bushings and end links. Wonderbar
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Old 05-13-2015   #3
markurtm
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Re: Need a new exhaust

Not to hijack this thread, but I'm curious if you experience any hp gain using Magnaflow.
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Old 05-13-2015   #4
90 L98 TransAm
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Re: Need a new exhaust

They claim 18 HP and 15 Lb-Ft gains - dyno sheets available at their website:

http://www.magnaflow.com/02product/dynos/firetrans.jpg
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