Tubing Coupler Type: StraightTubing Coupler Material: AluminumTubing Coupler Finish: BlackTubing Coupler Inlet Diameter (in): 3.500 in. (89.00 mm)Tubing Coupler Outlet Diameter (in): 3.500 in. (89.00 mm)Quantity: Sold individually.Fabricated exclusively of T-6061 aluminum and highlighting our unique pin/ball quick-release clamping mechanism, Granatelli Motor Sports HD clamps offer a completely sealed, integrated joining of your tubes with forced induction in mind. These are perfect for all boosted applications yet still offer a super clean look for naturally aspirated intake tubing trying to get away from simple sleeves and worm clamps. Our distinctive clamp designs are capable of withstanding operational pressures upwards of 800 psi and temperatures up to 400 degrees F. This makes them perfect for turbo intake tubing. Granatelli HD clamp assemblies deliver a flexible 12 degree bend connection that also resists flexing movements with their axis area and vibration.