Re: what is this?
I had a reply on this but internet crapped out.
Go with a bolt-on cutout if you want one, these will leak and turn to crap after a little time.
You most definitely put it before the mufflers, for the most part just after the collectors on long tube headers.
"I'm not driving too fast...just flying too low"
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
90 7up vert - new project-07 DSG Focus -DD