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4P Custom Exhaust Valves (8)
This allows you to exceed 900hp on E85 and easily over 1000hp on E30 while maintaining consistent fuel control
4P Engines are built to WIN races and to keep running over and over
allows smoother chain travel at high RPM
as flow will reduce as the filter gains contaminants stored
Ferrea Roller Rocker and Valve Spring Kit KT4038 - K20C1 Valve (Exhaust) 4P Custom Exhaust Valves (8)The 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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