Hey everyone, I'm trying to decide on exhaust. I want no muffler, but can't decide beyond that. I heard a video of 4" single straight pipe with rear cat delete that sounded good, but I heard it probably would have like no back pressure. I also thought of either 2 1/2" true dual or 3" single with 3" tails, both with rear cat delete or maybe even no cats. Videos, personal experience, any of that would be great.

 

https://www.f150forum.com/f6/exhaust...2/#post2529673

 

My truck has two cats cut off and no muffler then breaks into a Y pipe i love it and someone please explain how i could tell if it has no back pressure?