aFe 46-20704-B BladeRunner 3 IN & 3-1/2 IN Aluminum Hot and Cold Charge Pipe KitaFe 46 20704 B BladeRunner 3 IN & 3 1 2 IN Aluminum Hot and Cold Charge Pipe Kit Flow and Performance: Smooth transitions in the mandrel bent aluminum pipes decrease turbulence and minimize pressure loss, increasing horsepower and torque. This 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