They're new 245cc runner ET performance cylinder heads with around $2000 worth of extra machine work and porting. They've been angle milled 1* so they're now a 10* cylinder head. The intake flange and bolt hole faces were all corrected for the angle mill. The combustion chambers have been totally overhauled and mirror polished and measure 64cc's. They have a custom 45* intake valve job cut on a 2.125 instead of the 2.08, and the exhaust is a custom 50* seat valve job cut at a 1.550. The intake ports have also been overhauled and now are up about 20cfm over what they were from ET Performance. The intake pushrod holes have also been sleeved to run a much larger pushrod on the intake side. I also have valves with these, they're 5/16 2.125's intake(backcut was changed from rev back cut to maximize flow), and 1.600 rev exhaust valves cut down to a 1.550 and put on a 50* seat to insure there was a nice thick margain on the exhaust side. Also these heads have been flowed on 2 seperate flow benches, a SF600 and a SF1020 Probench, both of which read a little low over average. The SF1020 reads about 10cfm low over Weld Tech's bench so on some other benches these things could flow upwards of 370cfm. I'll try to get some more pictures of the heads and valves up later tonight. Asking $2800




.200 lift: 149cfm
.300 lift: 225cfm
.400 lift: 281cfm
.450 lift: 302cfm
.500 lift: 325cfm
.550 lift: 340cfm
.600 lift: 354cfm
.650 lift: 362cfm
.700 lift: 344cfm