Good day all... As I'm not currently with my truck... I'm trying to find out what the stock exhaust size is on the 2007 6.0L diesel Harley. I'm looking to replaced he exhaust in a couple weeks while home on vacation. I am currently looking at an MBRP off road exhaust with a 6" tip. Any thoughts?

Always open for thoughts. I show my truck and am looking to make it sound more aggressive. Harley look and loud pipe.

Thanks.