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, SmartSeal clamps and heavy-duty, 5-ply, polyester reinforced silicone couplings for superior strength and durability. Finished in wrinkle black powder coating with a unique laser-etched aFe power logo for a custom look.