exhaust rattle with cold start
 

I noticed this morning while letting my car warm up that there appears to be a metallic rattle coming from my exhaust. When the car is warmed up, it doesnt appear to make that noise. I have the Berk HFC and a surewin Y-pipe.

Is there any area I should be looking at first to determine with its the exhaust rattling? It seemed kinda weird that it only rattles when the car is cool. Has anyone else experienced this?

btw... I had the body guy at the Nissan Dealership install the parts(under the table) when it was in the shop for body repairs....

Sure win y pipe. I had exhaust before it no rattle and when I installed it there's always a cold rumble. Price we pay for such a loud wide pipe

I had the same problem when i installed the berk HFCs with my stillen CBE. The rattle is the y pipe hitting what i am pretty sure is a support for the chassis. I think the Berk HFCs make the y pipes hang a bit lower than normal and then it rattles. The way i solve dit was by using a crowbar for some leverage in between the y pipe and support which simply make sthe y pipe go up a bit and the rattling stopped for me.