Looks like there has been a lot of questions about exhaust lately, I had many questions about some of the statements being made as they didn’t seem like any answers have been given only," I head" type statements without any type of support.
Being from more of a hot rod background most didn’t make common sense to me so I thought I would Google Exhaust Technology and the first one although it was a sport compact page I think it nailed down most of my questions.

Here is the link if you would like to give it a read.

http://www.sportcompactcarweb.com/te...scc_ssbbpart2/

 

which part of all that 4cyl-bs do you want us to read? if you want a set of headers and/or complete exhaust, go to (downyoffroad.com).

 

The full article,
It explains a lot about the exhaust system without being an advertisement.