I've noticed from the day I put the HKS on that the thicker pipe is hitting something when I go around turns at a slow speed.. I'm almost positive its not the muffler.. plenty of clearance around there.. I'm pretty sure its the pipe section right before the bolts thats hitting the section where you fit it through... It's much thicker than stock and the room is a little tight there.. Anyone else?

 

i havent noticed anything like that sorry i know im not much help but im sure someone else can help you

 

unless you like burnt flesh, shake the pipe and looks where it's hitting... only way to get your answer.