Husker98

iTrader: (11)

I recently purchased a used engine from another member and I'm trying to find more info on the Patriot LS6 heads 59cc heads dual valve springs. I'm guessing these are ported 243 castings. Where the 243 would be it says patriot on one side and LS6 on the other with patriot etched just above exhaust ports. Anyone know what happened to patriot? Valve sizes? Spring specs? Intake runner volume? And where do these stack up against other heads?

Thanks

onefast84

Patriot is now promaxx. What size valves are in it? The valve sizes should give you an idea of what stage port job they have. Mine are stage 3 with a 2.08 intake valve, and a 1.6 exhaust valve. They are a pretty good head, they flow around 320 int at .600 lift. You should be able to contact Promaxx, and get some info

Husker98

iTrader: (11)

I never got info on stage or valve sizes. Heads are bolted down which I can always pull them. Ill check out promaxx thanks

jaywill

iTrader: (5)

how did your 5.3 run with the better heads ?