The MagnaFlow Touring Series cat-back for compatible 3.0L BMW models (2006–2011 coverage in source) is a direct-fit stainless system designed for cruising and everyday use. With mandrel-bent 2.5" main piping, two straight-through mufflers and dual straight rear 3.5" polished tips, it yields a powerful, resonant exhaust note at moderate exterior and mild interior sound while replacing stock rear components.
MagnaFlow SYS C/B 07-09 BMW 328i 3.0L