Use this to start your own custom tube upper intake manifold. O-ring and V band design allows 360 degree rotation of your tubular upper intake elbow for unlimited positioning options,  quick r&r of the intake plus a leak-free o-ring seal designed for high boost. Viton O-ring is designed to withstand ethanol and methanol fuels. O-ring and mounting hardware to your lower intake included, optional 4" aluminum weld flange and v band clamp available- please select options.