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Old 10-07-2011, 11:59 AM   #1
CamaroCowboy

 
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Tunnel brace?

Have a question? I just installed a 3 inch exhaust. My tunnel brace will not fit anymore. Is it needed or is there one I can buy specifically for 3" or bigger exhaust.

I searched and could not find any info. So please keep the butthead comments to yourself.
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Old 10-07-2011, 12:16 PM   #2
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yes the brace is needed...Here's a thread with another option for you http://www.camaro5.com/forums/showthread.php?t=162297
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Old 10-07-2011, 12:17 PM   #3
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LSR performance has an awesome tunnel brace for 3 inch exhaust. I have it and its really nice and was only like 90 bucks
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Old 10-07-2011, 12:19 PM   #4
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http://www.lsrperformance.com/chassi...pan-brace.html


here is the link if you are interested
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Old 10-07-2011, 01:59 PM   #5
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I believe BMR sells a stronger one that adds clearance. For mine, I just added a few washers to each bolt to give it enough clearance so that it doesn't make contact with the piping.
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Old 10-07-2011, 02:23 PM   #6
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Mine is down way to far. I must have done something wrong. I am going to look at it again tomorrow. I will let yall know what infigure out.
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Old 10-07-2011, 02:27 PM   #7
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This what you need. American Racing Headers created this brace. It's awesome, rock solid, made for 3 inch exhaust:
http://www.camaro5.com/forums/showth...ight=arh+brace
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Old 10-07-2011, 02:40 PM   #8
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Quote:
Originally Posted by phdjent View Post
This what you need. American Racing Headers created this brace. It's awesome, rock solid, made for 3 inch exhaust:
http://www.camaro5.com/forums/showth...ight=arh+brace
Nice-looking brace! I can't believe I haven't seen/heard of that one 'til now. 'Might have to go on my to-do list.

(This thread should probably be moved to the suspension section of the forums.)
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Old 10-07-2011, 02:47 PM   #9
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My car is now lowered and still plenty of room to the ground.

http://www.camaro5.com/forums/showth...ight=arh+brace



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Old 10-07-2011, 03:09 PM   #10
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I did an ass load of research on this and basically it is there to aid in rigidity of the chassis upon side impact! some will say its not needed, some will say it is. I couldnt stand it not being there. I ordered the elite engineering tunnel brace that has a built in 1/4 in drop also added the dogbone spacers that came with my SW catback system. a coule washers will work.

make sure the Xpipe is not in upside down. the ARH x pipe has a slight bend in it that allows it to tuck up nicely in the tunnel. if its upside down it will extend an inch below the tunnel. dont know whos xpipe your running but you may want to check on it.

The brace definitely adds rigidity to the chassis. As evidenced by jacking the car from the rear left side by the exhaust. with the brace in, i can get the car up high enough to slide the jackstands under both sides of the car. without it, the right side droops about 2 inches too low with the floor jack fully extended. cant get the jack stand under it.

Good luck with this, it kept me up at nights.
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Old 10-07-2011, 03:11 PM   #11
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here is a thread i started as part of my solution to the problem.

http://www.camaro5.com/forums/showth...t=tunnel+brace
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Old 10-07-2011, 03:26 PM   #12
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I installed this one, I had to add some longer bolts and 2 painted black aluminum block shims. My SLP resonators are right where this brace installs.
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Old 10-07-2011, 04:57 PM   #13
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Also, when you choose what brace you want, make sure the exhaust does not touch it and vibrate. I did a search and found a few people on here had the exhaust touching the brace, and the vibration was felt through the car, all the way to the knock sensors on the engine. The computer thought the car was having detonation, so it would retard the timing. So the car was actually losing power.
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Old 10-08-2011, 06:11 PM   #14
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Ok. Yes the X pipe was upside down. However even after fixing that it is still to low for my aftermarket Barton tunnel brace even with 4 washers on each bolt. Any ideas?
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