These kits are designed to help flow bench technicians test Harley Davidson Milwaukee 8 heads on their flow bench. Works with our valve opening fixture part no. DEL- VOF2500 and similar designs. Items included: 2 test springs machined bell mouth w/hardware rock pedestal adapter brackets w/hardware 4 valve adjustable adapter bracket w/hardware Kit does not include a bore fixture, valve opening fixture, or cylinder head. Please e-mail with questions.