Ok so I recently got my Frankencar B-pipe installed and I had some problems with the exhaust knocking. I went to get them fixed and the knocking got better, but I still hear it over large bumps. So today while looking under my car I noticed how my B-pipe hangs extremely low. Originally I thought it should be that way until I went to Frankencar's website and saw the difference. Here's some comparison pics:

My B-pipe:



Frankencar's:



As you can see, my s piece isnt "tucked in" like it should be. Because my s piece is so much lower, it bangs on the suspension support, right before it connects with the rear section piece. At first I thought my pipe was mis-shapen, but off the car it looks exactly like it should. I thought maybe the mechanic put the cat on backwards, so the brackets/bolts don't line up properly on the exhaust pieces, but would the car even work then? Wouldn't I be throwing codes like crazy?

And FYI, I have a Cattman Y-pipe and Cattman Rear section, but I don't know if that affects anything. I thought that maybe the cattman rear section piece is longer than Frankencar's, so the b-pipe is being pushed down, but I can't find any comparison pics between Cattman and Frankencar rear sections. Anyone have some??? Any help appreciated!!!

 

mine hangs a little lower than in the FC pics, but I've eliminated all banging by adjusting the hangars and using hose clamps on them...

 

hey, i jsut got a cattman catback and i had minor fitment issues that lead to banging as well, wat i did was jiggled it to see where it was banging, it was hitting the rear heat shield so i bent it whre i needed to, then i zip tied all the black rubber hangers and it makes it move less, i think it should help alot with your hanging low issue

 

I dont think the low hanging is caused by the hangers, but by either the pipe itself or the rest of the exhaust set-up. To stop the exhaust banging, the whole thing needs to be moved up and over. What I'm trying to figure out is why the b pipe is so out of place.

 

aftermarket Bpipes are heavier than stock ones...especially one like the FC...it hangs lower causing more stress on the rubber hangers...just use hose clamps around it to beefen up the hangers...or buy some polyurathane nismo hangers..

i compared my stock bpipe and cattman bpipe...the stock one is noticeably lighter if u ask me

 

use the ebay eurothane hangers,the red and blue ones. thats what i did on mine, it raised everything up nicely and got rid of all the banging i had, which was a lot.

 

just an update: i changed the hanger on the B pipe and so far that has solved the problem....thans for the help.

 

Good to know...

And just to add since I never posted previously, that my FC b-pipe actually sits lower than yours did, but I never experienced any banging on any of the braces.