Flow numbers are part of the story — not the whole story. At Frankenstein Engine Dynamics, our porting is built around synchronizing the intake port, combustion chamber, and exhaust port so the head works as a system. The result: stronger throttle response, higher volumetric efficiency, and faster, more complete combustion — especially when you add boost or spray. 5-axis CNC porting Newen CNC valve job meticulous hand finishing. If you want a head that runs harder everywhere, this is it. | Frank

The valve job is under-rated by most but at Frankenstein it is a key element to our legendary performance. The valve is certainly the most perplexing impediment to air flowing through a cylinder head and it’s only appreciated by those of us who spent years testing valve jobs on tracks and drag strips. The gains achieved by a proper valve job can’t be understated, particularly in high horsepower applications, as it’s possibly the most complex and critical design element every form of performance