[Kozak]

My dad's 2008 Harley F250 has exhaust intake, dpf delete(which is basically just piping that replaces the dpf) and a tune. picked up a shitload of power and mpg. I'm pretty sure he'd beat my little brother's firebird formula, lol.

[enkeivette]

Well I'm going with the Amsoil, so I'll leave the DPFs alone for now. If I stumble upon a tuner in the future I'll bust out the reciprocating saw and the welder.