RKTek head
Bolted this unit onto my 02 MX 600 in 03. Jetting was decreased significantly, resulting in better fuel mileage. Power has seen a substantial boost, although not in HO territory yet, even when combined with the Dynoport single and Can. Not down by much, but still half a length back of my 04 SDI. Closer than what it should be. Machining is exceptional, heads are cooler, throttle response is much more instant. Overall, great investment for the small block 6.
Performance- 9/10
Value - 6/10 (it's costly)
Looks - 10/10 (looks like heavy bling bling to me)