Is there cutting involved when switching the stock exhaust system for the performance exhaust system? Or, is it just a bolt off/bolt on install? I am really on the fence of whether to get the Performance exhaust. Install cost at the dealership is about another $165-200. Just wanted to know how difficult the install is. Thanks.
'09 e90 AW 335i M-sport
BMW PPK 1 / BMW Perf. Exhaust and Gloss black grilles / 19" BMW 313 Perf. wheels / BMW Perf. aero side skirts and rear diffuser