GM designed this head for serious airflow, but we can make it even better. There are several versions of the LS1 head, from the 4.8L, 5.3L, and 5.7L cars and trucks. Each of these heads has its benefits (chamber design, port shape, compression, etc), and we can port your stock head or help you decide on a possible alternative. You provide the core, or we can locate one for you. Our heads feature the best quality parts, just check the specs below. Check our Services menu (at left) for milling, O-ringing, and other services.