Flow and Performance Smooth transitions in the mandrel - bent aluminum tubing decrease turbulence and minimize pressure loss, increasing horsepower and torque. Perfect Fit This tube kit features a CNC machined turbo adapter flange, stainless - steel T - bolt clamps, and heavy - duty 5 - ply polyester reinforced silicone couplings for superior strength and durability. Custom Appearance It's finished in wrinkle black powder coating with a unique laser - etched aFe POWER logo for a custom look. When it comes to engineering for power, performance, protection and value, aFe POWER is the only choice.