DRC stage 4 cylinder heads
Green Planet Engine Technologies Motorsports Division DRC Stage 4 cylinder heads give true horsepower. All of our heads are fitted with Eibach valve springs. These valve springs were designed and tested on a spintron to give maximum performance to your Hemi.
The valve seats our machined with our Winona Multi-Angle/Radius seat and guide machine. All intake and exhaust ports are engineered , engine dyno and track proven. We flow each cylinder head prior to shipment on our Superflow 1020 flow bench with the latest software