Aereon

I just recently installed my slp lmII's and catted x pipe, when i rev the engine in park it sounds normal, but when i'm driving i hear a small tinkering sound like there might be something loose, what could this be? I've tightened everything with the impact wrench

please help

ajmodelski

Is it a tapping noise that increases frequency with rpms?

Aereon

uhmm i hear it only from 2k on up
and its like a metallic sound not sure if its a tapping sound

SVTBill

if you tightened it to tight you could have stretched some threads and made stuff looser.

GThopeful

I have about the same noise happening to me. Started after I had my x-pipe and catback installed, and was told that it was an exhaust leak from where my headers connect to my x-pipe. I've had 2 shops try and fix it and it still makes the same noise...

Aereon

could it be a prob with the x pipe? and gthopeful did your xpipe come with a eo certificate for smog?

99SlvrStang

check to make sure the pipes aren't hitting the undercarriage anywhere

Aereon

i've been getting underneath the car and having my friend rev it.. the sound is non existant when in park

4.698GT

yea make sure the pipes are hitting while you are driving. From you description that seems the most reasonable anwser. Check to look for some wearing of the paint underneath the car where the pipes might be smacking.