The port shape is identical to the 243-cylinder head. The 317 heads flowed more than the 706 heads by as much as 20 cfm at some lift points. The test engine was an easy choice, as the 5.3L was the go-to engine, especially for the power-adder crowd. here are some fuel rail covers for the LS engine, but we couldnt find ones that specd the 5.3L precisely. If you're uncertain, here are a few factors to consider before going for 799 heads. Looking at the BTR Stage 3 truck cam. Usually about 7.425, but we recommend the use of a length checker before ordering just in case. S. The LC9 engines also came with 799/243 heads. Scroungers are known to CNC port the 862/706 heads to get them to outflow the more expensive Gen IV 243/799 head. Torque limiting can be completely shut off, shift points can be raised and it makes it easier to tune for a bigger cam and injectors later on. It was actually the 8th digit of the vehicle identification number. Just want it running before winter. The Gen III have 862/706 Gen III heads, and the Gen IV have 243/799 heads. The 243-cylinder head features both an intake port shape and an exhaust port shape designed for maximum efficiency. Take your time and compare your options before making a decision. making 310hp (235kW). (Is It Bad to Remove Them? The intake port volume for 799 LS heads is 209 cc. SMASH THAT SUBSCRIBE BUTTON! LS engine spec guides and LS-relatedinformationhere. Usually found in GM trucks, the LS engines with 799 heads come in two sizes: 5.3L and 4.8L. Hello, Im wanting to delete the DOD in my 2011 Sierra 44 with a .525 or so cam, I am wanting to know the best parts I should use for lifters, push rods, maybe 1.8 rockers, springs, bushings, locks & or injectors. The 799 cylinder head was mostly used on the L33, which is the aluminum block version of the LM7. It was found that the 799 heads were superior, offering as much as 20 cfm more than the 706 head at some lift points.
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