ICT Billet intake manifold adapter kits are manufactured from premium aerospace grade USA 6061-T6 billet aluminum. These innovative adapters can allow swapping a rectangle port intake with cathedral port heads on LS engine and even swapping intakes on a Gen V LT engine. One of the biggest advantages is the ability to swap an LSA supercharger (found on 2009-2013 Cadillac CTS-V and 2012-2015 ZL1 Camaro) to an LS1, 5.3L, and any other GM LS engine with cathedral port heads.