Jeep/AMC 4.0 LS Converted Competition Cylinder Head.
Jeep/AMC 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" lift, 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 Naturally Aspirated and more with Forced Induction, with much added efficiency from the crack of the throttle to peak rpm. Your exhaust note and tone will change(Deeper/Louder) with the addition of these heads due to size and flow characteristics***
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 cylinder head cores w/o cracks "REQUIRED" or a core charge of $250 will need to be applied at checkout with all stock casting head orders. To avoid the core or shipping hassle checkout our "CNC head" listing.
***Lead time once order is placed for heads is around two weeks as of: 06/21/23***