aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3.5in Aluminum Cold Charge Pipe - BlackaFe 20 23 GM Diesel Trucks V8 6. 6L L5P BladeRunner 3. 5in Aluminum Cold Charge Pipe Black Smooth transitions in the mandrel bent aluminum pipes decrease turbulence and minimize pressure loss, increasing horsepower and torque. This kit includes high quality, stainless steel, spring loaded t bolt clamps and heavy duty, 5 ply, polyester reinforced silicone coupling. This charge pipe kit also features factory style billet aluminum quick connect adapters