Y-pipe bumping floor
Originally Posted by TAQuickness
poly mounts are time consuming to install, but worth every cent. Much better alternative to jury-rigging a band aid
the heater hose i got was the biggest size autozone had, and i used zip-ties and a hose clamp to hold it in place. basically just wrapped it all the way around the pipe and secured it to itsself. it wont melt, i'm sure heater hose has seen hotter, and the y isnt as hot as say the primary tubes. i had tried just jamming some in there but it fell out on the highway, so i decided to find a way to secure it.
To echo the above comment, the poly mount installation is a PITA, but its worth it. All you really need to do to see the benefits is the driver's side. My old custom Y-pipe with cats was so close to the floor pan that it almost touched (maybe 1/4" clearance) and it would bang all the time. The stock motor mounts just allow lots of movement, which is why that big *** flat spot is there on the stock Y.
When I had my duals built I didn't use cats and we incorporated a Dr Gas frame clearance pipe under the crossmember just behind the driver's side collector. This has made a ton of difference. I would recommend to those that are having a custom Y built to consider using one of the Dr Gas clearance tubes. If nothing else, swap in a poly mount on the driver's side.
When I had my duals built I didn't use cats and we incorporated a Dr Gas frame clearance pipe under the crossmember just behind the driver's side collector. This has made a ton of difference. I would recommend to those that are having a custom Y built to consider using one of the Dr Gas clearance tubes. If nothing else, swap in a poly mount on the driver's side.
Originally Posted by ShevrolayZ28
I don't know but I hear Thunder Racing sells this rubber bumper/hanger, made by Muflex, that treats the symptoms.
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From: TX
bash the floor in, loosen the clamp- pry the pipe down- tighten clamp, wedge soft/springy material between pipe and floor
---or---
take the time to put poly motor mounts in. worth every penny, no adverse side effects (like the vibration you get from poly trans mounts). you'll be happy that you didnt bash your floor or rig your exhaust
---or---
take the time to put poly motor mounts in. worth every penny, no adverse side effects (like the vibration you get from poly trans mounts). you'll be happy that you didnt bash your floor or rig your exhaust
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From: Live Oak, FL - in the woods where the creatures lurk.
I RTV'd a piece of heater hose to the floor board, only to find out the I pipe was banging on the tunnel brace. Washered it out some more and banging went away....now gotta get that piece of hose out before my fillings vibrate out, LOL.
Straight headers going on the camaro 
Originally Posted by spy2520
the heater hose i got was the biggest size autozone had, and i used zip-ties and a hose clamp to hold it in place. basically just wrapped it all the way around the pipe and secured it to itsself. it wont melt, i'm sure heater hose has seen hotter, and the y isnt as hot as say the primary tubes. i had tried just jamming some in there but it fell out on the highway, so i decided to find a way to secure it.
I did the exact same thing and it worked great, stopped every bit of that vibration and rattling
I just had my friend weld me up a bracket to where the original Y-pipe attached to next to the tranny and that stopped the banging on the driver side, best part it was free and took maybe 10 minutes.
Originally Posted by hunterdawgs
I got the "bumper stop" made by mufflex and the rear O2 sensor of the Kooks ORY(kooks LT's) was right in the way.We ended up bending the L-bracket that bolts against the body 180* and that got it to work just fine and it fixed the banging.
