LS3 / L92

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Excellent cylinder head for making great HP/TQ #’s with a relatively mild cam shaft.
They start off with a LARGE port and LARGE cross section while flowing pretty well  (almost 320 CFM out of the box) but with a nice 5 angle valve job and portwork in specific areas we can see 30 CFM while keeping the port almost the same size and making the port “work” much better. $650 for 5 angle valve job, portwork, milling, cleaning and assembly (reusing customers valves, springs, etc).

Other options to include:
Manley Race Flo 2.165/1.590 valves for $320

Lunati 73925 K1 dbl spring kit for $220

The LS3/L92 heads are a lot different than the cathedral port LSx heads and will require a COMPLETELY different camshaft profile to take advantage of this new port design. We offer several different camshafts to take advantage of this port design. $375-425 for any billet LSx cam.

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