Perfect Fit: Includes stainless steel clamps for a leak-free seal and heavy-duty 5-Ply polyester reinforced silicone hump coupling for strength. Mandrel-bent Tubing: Constructed of 2-1/2" to 3" mandrel-bent aluminum tubing then powder-coated wrinkle-black for heat and corrosion resistance. The smooth transition mandre l bends decrease turbulence which increases horsepower and torque. The high-temp wrinkle-black powder-coating insulates the tubes from engine heat and protects them from corrosion. Two 1/8" NPT ports are provided for sensors or water-methanol injection. aFe Badging: Unique aluminum laser-cut aFe Power logo plate is welded-on for an aggressive style.