i know this is a repost but im sorry i dont have the search feature and i cant find it. i just oderer my y pipe from the 160 shipped group deal and i recieved it today. i was so hyped that i installed it today also. i remember sombody say that they had a rattle coming from the y pipe at low rpms and when ever they went over speed bumps and so on. im cant remember if people said if it was normal or not. im having the same problem. is it the cat shield or that hanger tha hold up the pipe? or is it normal and will eventually go away?????

 

bump bump bump

 

My WS y-pipe doesn't rattle at all.

 

is yours ss or alum steel

 

it was me who had the problems, so i called Dallas from WS said bend some brackets on the cat away from the body, its hitting the body somewhere arudn the cat convertor, mine actually wound up being the bpipe hitting the chassis. but i called Warpspeed, the rattle may subside after a week, you gotta drive your car alot so the flex section has time to break in and the rattle will soon stop. check if your bpipe is hitting the chassis, check those brackets on the cat convertor, he said take a flathead screwedriver and bend them away, something of tha tnature. hope that helps, im guessing most of what i said made no sense since im pretty sleepy right now

 

thanks mansurxk i checked the cat and it not the cat makin noises and have an aftermarket b pipe and it never made noises before and it sounds like its comin from the y pipe/cat area so i doubt its the b pipe. im hopin its the just the flex section needed to be broken in. ill just leave it for a week and see what happens. the rattle isnt unbareble and i like i said it only happens at speed bumps and once in a while at idle like then the radiator fans kick in.

 

anybody else know its been what it could be its been 3 days since i had it on and there rattle still hasnt changed?

 

did you put the brackets back on that attach to theflange of the ypipe, someone also mentioned the pipe might be hitting the side rails where it goes to the engine, i had 2 rattles, one when i pressed the pedal hard other was the bpipe, the pedal one went away in a week.

 

I think i may have the same problem, my cat is making alot of noise now when i rev or even change gears. I have had it for only 9 months / 7,000 miles? Any suggestions?

 

did you use an exhaust gasket between the flex section and the cat?

 

Yes, I blieve so, whatever dallas sent i put on. Why would that matter?

 

yes it makes a big difference:

w/ gasket = nice vroooooom
gasketless = ricefart

 

yea i put gaskets and have a nice vrooom but only around idle and low rpms there is this rattle. i have this huge exam on monday so i wont get a chance to look at it until later this week.

 

"yea i put gaskets and have a nice vrooom but only around idle and low rpms there is this rattle. i have this huge exam on monday so i wont get a chance to look at it until later this week."

I have the same thing both of my gaskets are there, i can see them??? what is the problem? I was told that maybe something is in the CAT or the CAT was bad? Any help????????