Whenever upgrading your N54 we suggest going to a true BOV like a Turbosmart Raceport. This cold side charge pipe allows you to do that, while getting rid of the prone to cracking plastic charge pipe, and plastic diverter valvess. Charge pipe is made from high-quality aluminum, tig welded, has two 1/8″ NPT meth bungs, and a flange to fit Turbosmart Raceport or Tial BOV.