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Old 08-04-2008, 08:32 PM
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Default Header banging

So i just installed my headers the other day and as soon as i drove away when i take off it feels like something is banging or grinding by the floor board. I can only feel it in my gas pedal. Does anybody have any idea what this could be. I think it might b the y pipe but not sure. Any help is greatly helpful
Old 08-04-2008, 08:33 PM
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Im pretty sure its the y-pipe. Mine does the same thing and its really starting to get annoying. Im going to look at it this weekend and see if i can figure out a way to fix it.
Old 08-04-2008, 09:12 PM
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Ok good i thought thats what it was. I heard that there is a bracket thing you can buy that keeps it from doing that but i wasnt sure where to get it. If you figure it out you should pm what it was and wht you did to fix it. Thanx
Old 08-04-2008, 09:14 PM
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Some people are about to do poly motor mounts... Seriously, don't bother with the bump stop mod. To fix this right just buy some poly motor mounts from Speed Inc. Done.
Old 08-04-2008, 09:17 PM
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Get poly motor mounts.. Stock motor mounts are soo soft when you get on the throttle the engine moves all over the place which moves the entire exhaust system with it. Others go with the band aid and get mufflex bump stop but all that is doing is using your exhaust to stop the engine movement essentially making your exhaust a motor mount and masking the real problem.
Old 08-04-2008, 11:16 PM
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I have the same issue someone told me the motor mouts would make the front end of the motor rise more pushing the y pipe closer to the floor
Old 08-04-2008, 11:28 PM
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I dunno if i'd recommend banging a header..... sounds painful
Old 08-04-2008, 11:30 PM
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Should have just done the mounts while the manifolds were off, it's super easy then. Do the mounts, don't screw around with that hanger thing.
Old 08-04-2008, 11:47 PM
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You guys that have installed the poly mounts, do you Notice any difference in feel or vibration in the car after installing poly motor mounts?
Old 08-04-2008, 11:52 PM
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I had to do poly mounts too (a big PITA)... I also pop riveted a hose to the under side of the floor board as well.
Old 08-05-2008, 12:18 AM
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Thank you guys for all the help. How hard is it to install the mounts or the bump stop mod?
Old 08-05-2008, 01:22 AM
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Originally Posted by Skeet Skeet
Thank you guys for all the help. How hard is it to install the mounts or the bump stop mod?
i just did my motor mounts last weekend with my friend and it wasnt that bad. it took us about 11 hrs.
Old 08-05-2008, 06:19 AM
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Originally Posted by ChevyRyda99LS1
I have the same issue someone told me the motor mouts would make the front end of the motor rise more pushing the y pipe closer to the floor
Just go get some poly mounts and be done with it. No vibrations, no more banging, no engine movement. PITA install, buts its a right of passage. Everyone puts on headers and then realizes they need something else.

Could we stop listening to the advice of people outside of the internet? Just because someone had an IROC in the 80's doesnt mean they know anything about fbodys. And to all you muffler shop owners: Shut up and put the freakin exhaust on my car. I don't want to hear your stories of backpressure and the guy who wanted 3" pipes back in the 70's. Nor do I want to hear your recommendations for what I outa do with my "350." Do not make me hurt you. Do you hear that? Its a cam... Yes, that means I am brave enough to work under the hood of all that "computer stuff and hoses and wires." You still think you can teach me something, mister muffler shop man???
Old 08-05-2008, 08:16 AM
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Originally Posted by Mart00SS
You guys that have installed the poly mounts, do you Notice any difference in feel or vibration in the car after installing poly motor mounts?
Felt the exact same for me.
Old 08-05-2008, 09:22 AM
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Originally Posted by 95 Z28
Felt the exact same for me.
Cool, Thanks
Old 08-05-2008, 11:26 AM
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Checkout this Y-Pipe bump stop hanger. This fixed my exhaust from rubbing under the car.

http://www.thunderracing.com/catalog...&vid=3&pcid=54




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