Aeroflow Performance aluminium transition cone reducers allow you to transition your aluminium intercooler, intake, or exhaust tubing between sizes instead of using silicone hoses. Made from premium quality T6063 grade aluminium.Sized by the outside diameter,these aluminium transition cones can be easily welded to tubing of like sizes. These cones will not corrode or rustlike coated or painted steel pipes and are much lighter than stainless pipes. Aeroflow's aluminium, when welding produces contaminant free beads, for a show qualitywelding job!