Honda Trx450r Race Head Ported +1mm Ferrea Valves And Hardware All New. New oem head for Honda TRX450R 2006 - up. Ferrea valves +1 mm intakes +1mm exhaust valves. Throats are bored to gain the maximum advantage of the oversized valve then hand port the head then go back and do the valve job and final assembly. Oem honda valve seals and valve keepers and studs. Ferrea spring kit with titanium valve retainers. Same combination I have been using for last 15 years used by several pro mx riders. The red lubricant is used during assembly. The item "New Oem Honda Trx450r 06 Race Cylinder Head Ported +1mm Ferrea Valves…