N63 & N63tu Charge pipes For BMW 750i, 650i, 550i, Alpina B6 & B7 - ARM MotorsportsARM Motorsports' N63 Charge Pipes give you the ability to take your N63 powered BMW to the next level with methanol injection ports. Constructed of precision CNC machined 6061 aluminum, the ARM N63 Charge Pipes will allow you to tap methanol injection into your charged air pre intercooler, giving you the ability to decrease intake air temperatures, increase boost, advance timing, and prevent detonation. The N63 engine responds very well to tuning, as