The AWE 328i / 430i Touring Edition axle back exhaust is a straight-through concept, yet also features AWE’s proprietary drone-canceling solution, 180 Technology® to produce the perfect, drone-free exhaust note. Made in the USA, AWE axle back exhausts for the 328i / 430i are handcrafted from US-sourced T304L stainless steel, and come with a fitment guarantee, a no Check Engine Light guarantee, and a Lifetime Warranty. Complete with your choice of Diamond Black or Chrome Silver double-walled 80mm tips.