Borla cat back install
02-14-2012, 09:15 PM
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Car: 1988 Gta trans am project 1-1/2
Engine: 86 4 bolt main cammed sbc 355 hsr
Transmission: 89 wc bw t5
Axle/Gears: Bw 9 bolt (3.27) pbr 11in
Borla cat back install
Ok so I got a full cat hack borla for 75 bucks off of craiglist the only problem is that it is completely welded together how would I get it over the rear end without cutting it all up into pieces ???
02-14-2012, 10:15 PM
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Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: Borla cat back install
Jack the car up high. Pull the driveshaft. Disconnect the torque arm. Disconnect the PHB. Lower the rear axle down by disconnecting the shocks, let it swing down hanging from the LCAs. Slide the cat back forward from the rear, slipping the intermediate pipe over the axle until it gets where it is supposed to be.
02-15-2012, 07:52 PM
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Car: 1988 Gta trans am project 1-1/2
Engine: 86 4 bolt main cammed sbc 355 hsr
Transmission: 89 wc bw t5
Axle/Gears: Bw 9 bolt (3.27) pbr 11in
Re: Borla cat back install
Do I have to worry about the springs flying out also what should I replace when I have rear end down on the jack pretty much doing a complete overhaul on the is car somewhat
02-15-2012, 08:00 PM
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Car: 81' Z28, 87' Iroc Z28, 05' GMC Z71
Engine: LB9 - 305 TPI - 190 H.P.
Axle/Gears: G92 - 3.23
Re: Borla cat back install
Fuel pump, universal joints, shocks, rubber brake line running from chassis to rear axle, brake pads/shoes/hardware, springs, the rubber pads the springs sit on if they're in bad shape, pan-hard bar/bushings, lower control arms/bushings, torque arm mount rubber isolator.
02-15-2012, 08:41 PM
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Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: Borla cat back install
All the stuff that Heavy Thunder mentioned is stuff you can look at while your under there, but none of it is "required" to do while your there. But if any of it is "bad", you might as well replace it while your under there, if your wallet allows it.
02-15-2012, 09:56 PM
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Car: 81' Z28, 87' Iroc Z28, 05' GMC Z71
Engine: LB9 - 305 TPI - 190 H.P.
Axle/Gears: G92 - 3.23
Re: Borla cat back install
The rear springs won't "fly out". With the rear axle at full droop even with the shocks still connected, the springs will either barely be in there & could be pulled out or will fall out. So I wouldn't really have your head directly under them, just in case.
All the stuff that Heavy Thunder mentioned is stuff you can look at while your under there, but none of it is "required" to do while your there. But if any of it is "bad", you might as well replace it while your under there, if your wallet allows it.
All the stuff that Heavy Thunder mentioned is stuff you can look at while your under there, but none of it is "required" to do while your there. But if any of it is "bad", you might as well replace it while your under there, if your wallet allows it.
02-17-2012, 07:57 AM
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Car: 1988 Gta trans am project 1-1/2
Engine: 86 4 bolt main cammed sbc 355 hsr
Transmission: 89 wc bw t5
Axle/Gears: Bw 9 bolt (3.27) pbr 11in
Re: Borla cat back install
Yea that's true I found that the borla wasn't welded together it is clamped right at the bend going over the rear end so looks like just the phb an track bar will have to come outta the way the exhaust on the car now is a 2-1/2 inch with no cat the borla is a 3 inch so looks like I gotta put a adpater to actually bolt it up errr an clamp it all down then drive it over when it's on the road to get welded shut
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