I clicked your amazon link and it looks like the exhaust is "currently unavailable". Could be because I'm in Canada.
From my experience, 20' of 2.5" stainless tube bought just above cost (like a exhaust manufacture might get) is $100, a good stainless resonator and and muffler just above cost are about $100 a piece. So at the bare minimum $500 in raw material (if stainless and dual system). On top of this, a manufacture has to do r&d to make it, bend tubing, and weld the system together which are all costly process that have to be worked into the final cost. This is why cat-back exhaust cost so much. When you see a system for significantly less you can assume the materials and quality is going to be very very poor.
Btw if you're new to the site, listen to Blue Dream. He knows his stuff
Last edited by GoalieMan; 02-14-2017 at 01:16 PM.