Jeep/AMC 4.0 LS Converted Competition Cylinder Head.
Jeep/AMC 4.0 stock casting "Competition" LS converted Cylinder heads. We have changed our head production process and now these heads will all be custom built once your order is placed online and will normally take a 2-3 week turnaround time. At checkout, use the notes section to let us know your complete setup and usage so we can build your head to fit your application.
Our competition 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
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***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 are "REQUIRED" or a core charge of $250 will need to be applied at checkout with all stock casting head orders.