Supersprint BMW E46 M3 Stainless Center H-Pipe - Non-ResonatedEnhance the performance and sound character of your BMW E46 M3 with the Supersprint Stainless Center H Pipe (Non Resonated). Designed specifically for the S54 powered E46 M3, this mid section replaces the factory center section with a high flow stainless steel twin pipe layout that improves exhaust efficiency and sharpens the exhaust note. Supersprint engineers this component using dual 63. 5 mm piping with an H pipe crossover to balance exhaust