Hi guys. I just had my shop slap on my Apex'i N1 cat-back on my 1993 Prelude SI, non-Vtec. I'm using the stock hangers, but for some reason, part of the piping behind the muffler is touching the control arm of my rear, passenger side. It makes a super, annoying rattling sound when my car is started & at rest. The shop said it was normal, but I doubt Apex'i would make something that didn't fit perfect. I checked the box, and this is the exact exhaust model for my car. Anyone else experience this? Is it normal? Anything I could do? Help! Thanks folks.