1989 Irocz 305 TPI
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Junior Member
Joined: Mar 2009
Posts: 52
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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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iTrader: (7)
Joined: Jun 2008
Posts: 1,468
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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
Reading the Stickies above will help ALOT! Good luck
Junior Member
Joined: Dec 2008
Posts: 36
Likes: 0
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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