Single in dual out? They're pointless, they just make it look like you got a dual exhaust without having one. Just spend the extra 30 bucks n get a Flowmaster Super 44 single in single out. It will sound alot better. Thrush mufflers suck, they leak exhaust like no tommorow, they don't last more then 3 months...I've been thinking about putting a single/dual out muffler on my mustang. Would this muffler work?My dad has one on his 1990 ford f150 4x4 sound decent I was thinking about going with a thrush ty for any input I'm on a budget.