4inbore Test Head

Pro-stock port. 331cfm@700 lift.(25"test)

Street/drag/turbo port.265cfm@650 lift (25"test)

Test head showing each chamber and valve set on two different port designs

Exhaust Port

50mm x 40mm valves

Pair of 4inbore pistons and cylinders

4" Cylinders

78mm to 90mm flanged cranks available

New case prepped and ready for 4inbore application

New pair of angle flow castings. These are bare and have
not been drilled to accomodate
your desired stud pattern.