Thanks for explaining it.
I was thinking that maybe the exhuast flow created a suction and pulled air in by itself without a pump. I figured maybe it had a check valve or something to stop exhuast leak. Now I know better
I'll probably end up getting the Random Tech.
Cat is not something I want to skimp on.
I would hate to go to emissions and have it fail or have the cat restrick my exhuast flow. I guess peace of mind is worth the extra cash.
Thanks for all the responces!
