the.beast.2008
Member
I have a 2008 expy and I want to do high flow cats but i've heard from too many people different answers. i'm curious for others with 3rd gen expeditions who have done high flow cats, does it make it louder and what brand did you go with. currently I have true dual with an x pipe and no muffler out the back. Its honestly not that loud for a straight piped v8 which is why I would like to make it louder and longitude headers aren't available for expeditions. so hopefully high flow cats will be the answer to truly wake up this engine. please let me know!