Installed a 12599 Magnaflow on my '06 2500HD with the 6.0L and love the way it sounds. Very deep and aggressive down low and under hard acceleration but quiet on the interstate.
Well the seat of the pants dyno says sure but im sure a real dyno would prove otherwise on performance. However the factory muffler was very restrictive, there is a metal plate right after one of the inlets and right before one of the outlets so it definitely helped with flow. And mileage i don't know i haven't had it on long enough to tell.
Well the seat of the pants dyno says sure but im sure a real dyno would prove otherwise on performance. However the factory muffler was very restrictive, there is a metal plate right after one of the inlets and right before one of the outlets so it definitely helped with flow. And mileage i don't know i haven't had it on long enough to tell.
BDRISKEY 10 months ago