Shop MagnaFlow Performance Exhaust Systems for the 1999 BMW 323is, including cat-back exhaust systems for select engines, trims, and configurations. Engineered to produce MagnaFlow's deep signature exhaust sound, these systems feature premium materials and easy direct-fit installation. 1999 BMW 323is exhaust options include 2.5-inch main piping diameters; polished exhaust tip finishes; dual straight driver side rear exit styles. Use Shop by Vehicle to find the system for your 323is.