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4P Pro 163 CNC Cylinder Head with Ferrea valves
4P Engines are built to WIN races and to keep running over and over
5mm high compression
All components are 100% Genuine OEM Honda
Ferrea Roller Rocker and Valve Spring Kit KT4038 - K20C1 Valve (Exhaust) 4P Pro 163 CNC CylinderThe Ferrea Roller Rocker kit will eliminate the VTEC function on your exhaust cam, and replace the OEM intake rocker with the Ferrea rocker arm. The Ferrea valve spring kit uses a high quality PAC spring Made in the USA. It increases the seat pressure and open pressure to help control valve bounce and will allow safe operation up to and beyond 9000 rpm. This is especially critical in the event of a missed gear or mechanical over rev. We recommend this
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