N54 Charge Pipe For BMW E82 1M, E88 135i, E9X 335i, 335xi, 335is - ARM MotorsportsThe factory BMW N54 charge pipe on models like the 335i, 135i, and 1M Coupeis a ticking time bomb for any N54 135i running higher than stock boost, made of plastic and prone to cracking under higher than stock boost. Combined with OEM diverter valves that often leak, this limits your cars true power potential. The ARM Motorsports N54 Charge Pipe is engineered as a direct fit upgrade to solve these problems and unlock reliable performance, whether