I saw an article in the new Hotrod mag earlier in the week that gave some of the numbers for the new LS1 heads from Air Flow Research. They seemed to flow pretty well and made decent power on the dyno but didn't seem any better than the numbers that I've seen for the Stage 2 Patriot heads. I looked up pricing on the ARF website and they seem very expensive too, about $2500 ported and assembled, $1800 as cast. I know they have a very good reputation, but they're about 50% more expensive than the Patriot heads in Summit.
Also, does anyone know where you could get a set of LS6 castings unassembled? The whole LS6 conversion is only about $1800 in Summit, the bare castings can't be too expensive.
Also, does anyone know where you could get a set of LS6 castings unassembled? The whole LS6 conversion is only about $1800 in Summit, the bare castings can't be too expensive.