Jeep 4.0 LS Converted Competition Cylinder Head.
Jeep 4.0 stock casting "Competition" LS converted Cylinder heads. These heads are meticulously built from the ground up with all the upgrades and best parts such as: 2.02"/1.60" Stainless Steel 8mm valves, competition 5-angle valve job, fully hand ported and polished, beehive springs w/steel retainers and locks, upgraded Viton positive locking valve seals, custom machined spring seats for added cam lift capacity up to .600", machined guide holes for optional HD 3/8" pushrods, all fully assembled and ready to bolt on. **We recommend this style head for Strokers, Boosted applications, or 'Hot' upgraded 4.0/4.2 engines with upgraded cam, intake and header with increased rpm potential to reap the rewards. These heads depending on application and supporting mods will increase power levels from 25-75HP. ***(We also recommend a complimenting cam package, ported Intake, 60mm and larger throttle body, fueling upgrades(injectors/tuning/500CFM & up carb) and header collector size of 2.5" or bigger depending where you want your power band.) Undamaged CORE REQUIRED or a core charge of $200 will be applied. ***AS OF 06/23/21 HEAD ORDERS ARE 4 TO 6 WEEKS ON BACKORDERS.