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1989 Irocz 305 TPI

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Old Mar 27, 2009 | 04:49 PM
  #1  
Irocz_89's Avatar
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From: Michigan
Car: 1989 Iroc-Z Camaro: Sold :(
Engine: 305 TPI
Transmission: Built 700r4
Axle/Gears: 3.27
1989 Irocz 305 TPI

I need to know if I should change my exhaust from a 2.5' to a 3'. I just swapped the TBI motor for the TPI and the 2.5 exhaust needs to be bent into place for the TPI motor. Should I pay them to bend it back in place for me or should I take that 2.5' off and buy the 3' and put that on! Which would be better!??
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Old Mar 27, 2009 | 09:43 PM
  #2  
89ROC-Z's Avatar
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From: Minnesota
Car: 89 IROC-Z
Engine: 370 LSX, LS3 Top End
Transmission: Built T-56
Axle/Gears: 9" Aluminum Center 3.89's
Re: 1989 Irocz 305 TPI

Welcome to TGO! A 3" will help you alot, don't get a 2.5" cat back. If you want to free up your exhaust, and got an extra 1k laying around, get the hooker 2055 headers (3" Y-pipe exit), a good high flow cat (or cutout lol), and a 3" cat back. Magnaflows is real nice, but if you want it LOUD get the flowmaster 80 series.

Reading the Stickies above will help ALOT! Good luck
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Old Mar 28, 2009 | 05:01 AM
  #3  
88Roc-z's Avatar
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Joined: Dec 2008
Posts: 36
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From: Pearl City, HAwaii
Car: 88' Iroc-z
Engine: 305 TPI
Transmission: T-5 WC
Axle/Gears: 3.73 9-bolt
Re: 1989 Irocz 305 TPI

I got the Magnaflow free-flowing cat, and 3" SS cat-back system. I love em'! At driving speeds on the free-way like 65mph it's a mellow sound. I can still hear my stereo, but when I stomp on it from 1st to 4th she'll growl back when asked too!
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