Camaro Firebird 82-92 LS1 Conversion 1-3/4" Long Tube Headers w/ 2-1/2" Y-Pipe & Random Technology Metal Matrix Cats. These cats feature a metal matrix element that is more durable and flows much better than ceramic elements. These are the highest flowing cats on the market. These come with clamps but no gaskets. These are a Hawks Third Generation Exclusive. Produced by Stainless Works exclusively for Hawks Third Generation for 100% Quality & Fitment. These headers have been designed on a 87 IROC with an LS1 using our motor mounts, transmission crossmember and lowered with an Eibach Sportline kit. The headers do not have EGR port. Note: If you are using Spohn transmission crossmember you will have to modify the crossmember. Shipping is not included. Call or email for shipping quote. Please check all state emissions laws before purchasing.