Rectangle Port Cylinder Head to Cathedral Port Intake <br />   Can ONLY be used with LS rectangle port cylinder heads  Will not fit raised port LS7 cylinder heads <br /> <ul> <li>Fits ANY rectangle port head and bolts to ANY cathedral port intake manifold, supercharger or blower</li> <li>Package Includes: 2 adapter plates (1/2" thick) with 8 O-ring seals</li> <li>Made in Wichita, KS from 6061-T6, USA billet aluminum</li> </ul>   <br /> <br /> Intake manifold bolt lengths required when used with <li>Factory GM supercharger (M6 x 70mm) use ICT part # 551400 </li> <li>Car intake manifold (M6 x 130mm)  use ICT part # BOLTM6-130X10</li> <li>Truck intake manifold (M6 x 90mm)  use ICT part # BOLTM6-90X10</li> See our other listing for reverse adapters <br /> <br />   <br />