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subframe connector exhaust clearance.

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Old Mar 3, 2009 | 07:44 PM
  #1  
RED_DRAGON_85's Avatar
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From: Norfolk VA
Car: 85 Camaro IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: open rear, 3.42 gears
subframe connector exhaust clearance.

i am looking at getting subframe connectors for my camaro and it looks like i might have a problem with the exhaust on the pass side.
i know this has probably been covered a million times, but does anyone have pics of their pass side exhaust routing and subframe connectors clearance.
i cannot possibly see how i would make them fit.
ill post pics when i get a chance, but its cold as ***** out now.
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Old Mar 3, 2009 | 08:06 PM
  #2  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: subframe connector exhaust clearance.

what SFC are you looking at? most of them step up at that point and the exhaust goes under the SFC. Some styles will not work with the stock style exhaust.
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Old Mar 3, 2009 | 10:31 PM
  #3  
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: subframe connector exhaust clearance.

My UMI sfc is about an 1/8" away from hitting. I'm going to have to put a piece of header wrap between the Y and SFC to keep it from vibrating.
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Old Mar 4, 2009 | 06:57 AM
  #4  
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: subframe connector exhaust clearance.

No problems with my Global West SFC's and Hooker Y:

https://www.thirdgen.org/forums/atta...please-cat.jpg

JamesC
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Old Mar 4, 2009 | 07:16 AM
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From: Charleston, SC
Car: '85 TA
Engine: 350 turbo
Transmission: T56
Axle/Gears: 3.70 posi 9bolt
Re: subframe connector exhaust clearance.

I just finished mine and exhaust clearance was my biggest concern. I used 1-1/2" sq. x 1/8" tubing and I have a 4" thick Magnaflow muffler where the cat used to be. I removed the sheet metal cat heat guard so I could mount the tubing as close to the floor pan as possible. I ended up with at least 1/2" clearance between the two, so I am happy.



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Old Mar 4, 2009 | 09:18 AM
  #6  
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From: Old Bridge, NJ
Car: 1992 Camaro RS
Engine: 383 SuperRam
Transmission: 4L60
Axle/Gears: 3:23 Posi
Re: subframe connector exhaust clearance.

Originally Posted by calebzman
I just finished mine and exhaust clearance was my biggest concern. I used 1-1/2" sq. x 1/8" tubing and I have a 4" thick Magnaflow muffler where the cat used to be. I removed the sheet metal cat heat guard so I could mount the tubing as close to the floor pan as possible. I ended up with at least 1/2" clearance between the two, so I am happy.
I had to do the same modification to my UMI set. My y-pipe that I got with my dyno don headers was too close to the cross brace that came from UMI. So I had to cut it out and move the brace back in the same location as calebzman did. I also am in the process of installing a set of alston connectors as well.
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Old Jul 22, 2020 | 04:09 PM
  #7  
Tidan's Avatar
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Re: subframe connector exhaust clearance.

I know its an old thread but I didn't want to start a new one.
Currently doing my exhaust and wanted to know just how much clearance I need to keep between the subframe connector and exhaust?
Note: I just replaced my motor mounts with prothane poly's so the engine sits a good 1/2" higher now - thus the reason I'm re-doing my exhaust.
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Old Aug 4, 2020 | 12:40 PM
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From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
Re: subframe connector exhaust clearance.

I had 1/8" of clearance on mine, sitting still with the engine off. Sitting still idling (with a some cam chop) it would intermittently hit. Readjusted to about 1/4" and all was well. Obviously different set ups and different places along the exhaust will be more prone to movement, but typically most of us seem to have issues right there behind the rear wheel/cat area.
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