Brand New 18 degree heads CNC by weld tech..never been assembled. 260cc intake runners,53cc combustion chambers,2.180 intake valve and 1.65 exhaust valve. they flowed at the low 370 range at 700 lift.bare heads only..also Brand New in the box T&D shaft mount rockers 1.7 1.65 ratio. Call 517-740-7269. No text..Thank You.