subframe mod and y-pipe
#1
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Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
subframe mod and y-pipe
My subframe mod for better clearence for 3" exhaust since the 4L80E is bigger then a th700 and to make a stiffer torque arm crossmember.
Made some scether before I started to cut![lol](https://www.thirdgen.org/forums/images/smilies/lol.gif)
![](https://i373.photobucket.com/albums/oo177/gta324/2017/20161130_150842.jpg[/)
Made a temp solution for transmission crossmember ( and it may be permanet also...)
![Name: 20161211_150723.jpg
Views: 247
Size: 305.3 KB](https://www.thirdgen.org/forums/attachments/fabrication/315427d1501201779-subframe-mod-y-pipe-20161211_150723.jpg)
Driver side cut up
![Name: 20161225_161009.jpg
Views: 218
Size: 238.7 KB](https://www.thirdgen.org/forums/attachments/fabrication/315428d1501201779-subframe-mod-y-pipe-20161225_161009.jpg)
Pass. side.....
![Name: 20161225_172758.jpg
Views: 220
Size: 272.9 KB](https://www.thirdgen.org/forums/attachments/fabrication/315429d1501201779-subframe-mod-y-pipe-20161225_172758.jpg)
Cut the corner to make some more space...
![Name: 20161226_194944.jpg
Views: 210
Size: 219.1 KB](https://www.thirdgen.org/forums/attachments/fabrication/315430d1501201779-subframe-mod-y-pipe-20161226_194944.jpg)
test mounted pass side
![Name: 20161227_203911.jpg
Views: 218
Size: 294.5 KB](https://www.thirdgen.org/forums/attachments/fabrication/315431d1501201779-subframe-mod-y-pipe-20161227_203911.jpg)
![Name: 20161229_210029.jpg
Views: 225
Size: 259.0 KB](https://www.thirdgen.org/forums/attachments/fabrication/315432d1501201779-subframe-mod-y-pipe-20161229_210029.jpg)
Drivers side
![Name: 20161225_163527.jpg
Views: 228
Size: 236.0 KB](https://www.thirdgen.org/forums/attachments/fabrication/315433d1501201779-subframe-mod-y-pipe-20161225_163527.jpg)
Drivers side
Made some scether before I started to cut
![lol](https://www.thirdgen.org/forums/images/smilies/lol.gif)
![](https://i373.photobucket.com/albums/oo177/gta324/2017/20161130_150842.jpg[/)
Made a temp solution for transmission crossmember ( and it may be permanet also...)
![Name: 20161211_150723.jpg
Views: 247
Size: 305.3 KB](https://www.thirdgen.org/forums/attachments/fabrication/315427d1501201779-subframe-mod-y-pipe-20161211_150723.jpg)
Driver side cut up
![Name: 20161225_161009.jpg
Views: 218
Size: 238.7 KB](https://www.thirdgen.org/forums/attachments/fabrication/315428d1501201779-subframe-mod-y-pipe-20161225_161009.jpg)
Pass. side.....
![Name: 20161225_172758.jpg
Views: 220
Size: 272.9 KB](https://www.thirdgen.org/forums/attachments/fabrication/315429d1501201779-subframe-mod-y-pipe-20161225_172758.jpg)
Cut the corner to make some more space...
![Name: 20161226_194944.jpg
Views: 210
Size: 219.1 KB](https://www.thirdgen.org/forums/attachments/fabrication/315430d1501201779-subframe-mod-y-pipe-20161226_194944.jpg)
test mounted pass side
![Name: 20161227_203911.jpg
Views: 218
Size: 294.5 KB](https://www.thirdgen.org/forums/attachments/fabrication/315431d1501201779-subframe-mod-y-pipe-20161227_203911.jpg)
![Name: 20161229_210029.jpg
Views: 225
Size: 259.0 KB](https://www.thirdgen.org/forums/attachments/fabrication/315432d1501201779-subframe-mod-y-pipe-20161229_210029.jpg)
Drivers side
![Name: 20161225_163527.jpg
Views: 228
Size: 236.0 KB](https://www.thirdgen.org/forums/attachments/fabrication/315433d1501201779-subframe-mod-y-pipe-20161225_163527.jpg)
Drivers side
![Name: 20161231_144044.jpg
Views: 208
Size: 200.4 KB](https://www.thirdgen.org/forums/attachments/fabrication/315434d1501201779-subframe-mod-y-pipe-20161231_144044.jpg)
#2
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Thread Starter
Join Date: Aug 1999
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Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Re: subframe mod and y-pipe
Pass. side
![Name: 20170101_153227.jpg
Views: 217
Size: 222.7 KB](https://www.thirdgen.org/forums/attachments/fabrication/315419d1501201779-subframe-mod-y-pipe-20170101_153227.jpg)
Torque arm crossmember.....
![Name: 20170101_170328.jpg
Views: 229
Size: 236.3 KB](https://www.thirdgen.org/forums/attachments/fabrication/315420d1501201779-subframe-mod-y-pipe-20170101_170328.jpg)
Mounting check so it would be level to the ground
![Name: 20170101_171621.jpg
Views: 257
Size: 264.8 KB](https://www.thirdgen.org/forums/attachments/fabrication/315421d1501201779-subframe-mod-y-pipe-20170101_171621.jpg)
Drivers side welded...
![Name: 20170103_200649.jpg
Views: 220
Size: 233.9 KB](https://www.thirdgen.org/forums/attachments/fabrication/315422d1501201779-subframe-mod-y-pipe-20170103_200649.jpg)
Pass side welded
![Name: 20170108_182340.jpg
Views: 221
Size: 297.1 KB](https://www.thirdgen.org/forums/attachments/fabrication/315423d1501201779-subframe-mod-y-pipe-20170108_182340.jpg)
Torque arm cut, had to make it shorter....
![Name: 20170204_172225.jpg
Views: 255
Size: 268.9 KB](https://www.thirdgen.org/forums/attachments/fabrication/315424d1501201779-subframe-mod-y-pipe-20170204_172225.jpg)
Exhaust system, dual 3" to 3,5"
Muffler under the car can be replaced by straight pipe och catalytic convertor for emission test...
![Name: 20170401_173144_1.jpg
Views: 222
Size: 182.2 KB](https://www.thirdgen.org/forums/attachments/fabrication/315425d1501201779-subframe-mod-y-pipe-20170401_173144_1.jpg)
![Name: 20170101_153227.jpg
Views: 217
Size: 222.7 KB](https://www.thirdgen.org/forums/attachments/fabrication/315419d1501201779-subframe-mod-y-pipe-20170101_153227.jpg)
Torque arm crossmember.....
![Name: 20170101_170328.jpg
Views: 229
Size: 236.3 KB](https://www.thirdgen.org/forums/attachments/fabrication/315420d1501201779-subframe-mod-y-pipe-20170101_170328.jpg)
Mounting check so it would be level to the ground
![Name: 20170101_171621.jpg
Views: 257
Size: 264.8 KB](https://www.thirdgen.org/forums/attachments/fabrication/315421d1501201779-subframe-mod-y-pipe-20170101_171621.jpg)
Drivers side welded...
![Name: 20170103_200649.jpg
Views: 220
Size: 233.9 KB](https://www.thirdgen.org/forums/attachments/fabrication/315422d1501201779-subframe-mod-y-pipe-20170103_200649.jpg)
Pass side welded
![Name: 20170108_182340.jpg
Views: 221
Size: 297.1 KB](https://www.thirdgen.org/forums/attachments/fabrication/315423d1501201779-subframe-mod-y-pipe-20170108_182340.jpg)
Torque arm cut, had to make it shorter....
![Name: 20170204_172225.jpg
Views: 255
Size: 268.9 KB](https://www.thirdgen.org/forums/attachments/fabrication/315424d1501201779-subframe-mod-y-pipe-20170204_172225.jpg)
Exhaust system, dual 3" to 3,5"
Muffler under the car can be replaced by straight pipe och catalytic convertor for emission test...
![Name: 20170401_173144_1.jpg
Views: 222
Size: 182.2 KB](https://www.thirdgen.org/forums/attachments/fabrication/315425d1501201779-subframe-mod-y-pipe-20170401_173144_1.jpg)
![Name: 20170401_173130.jpg
Views: 222
Size: 244.2 KB](https://www.thirdgen.org/forums/attachments/fabrication/315426d1501201779-subframe-mod-y-pipe-20170401_173130.jpg)
#4
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Re: subframe mod and y-pipe
Wow nice job, very ballsy
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#9
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: subframe mod and y-pipe
Similar to how I did mine but I wanted a bit more stock look so I just sectioned the stock frame rails. Nice work!