aFe 46-20504-B BladeRunner Aluminum Hot and Cold Charge Pipe Kit BlackaFe 46 20504 B BladeRunner Aluminum Hot and Cold Charge Pipe Kit Black Flow and Performance: Smooth transitions in the mandrel bent aluminum pipes decrease turbulence and minimize pressure loss, increasing horsepower and torque. The charge pipe kit provides a smooth transition between the turbo and the engine for lower operating temperatures and increased power. Premium Hardware: This kit includes high quality, stainless steel, spring loaded T bolt