I have a BRAND NEW never installed KFX450 head. The head has been race ported and complete valve job by Dan at Dasa. The head is assebbled and complete with new valves, springs, Race cams ....... basically ready to bolt on and run. The head is $500.00 new, porting alone is $500.00, plus $595.00 for the Dasa race cams then new valves, seals springs ect. was another $300.00 plus I will even throw in a new factory head gasket. This is a full race head and will make some major HP once it is installed. I WILL SELL IT FOR LESS THEN HALF PRICE .............. $900.00 you wanna go fast then is what you want.