RWA1496 1.89" Intake valve +.100" This valve is for use with our #3 cams or your camshaft if it designed on a small base circle for .100" longer valves. This valve is NOT for use with roller camshafts, because it only has a .400" tip. Roller cams require a .470"-.500" tip. If you are using a roller camshaft the go to FERF6226.