DescriptionInstallation InstructionsClick HerePiston Bore Size96.00mmTypeIntake / ExhaustRetainer MaterialTitaniumIntake Valve Lift0.440″Intake Installed Height1.215″Intake Seat Pressure40#Intake Open Pressure147#Intake @ Lift0.440″Exhaust Valve Lift0.440″Exhaust Installed Height1.365″Exhaust Seat Pressure70#Exhaust Open Pressure203#Exhaust @ Lift0.440″Valve TypeIntake / ExhaustValve MaterialBlack Diamond™ StainlessCoatingBlack NitronegIntake Head Diameter36.00mm / 1.417″Intake Stem Diameter5.5mm / 0.2158″Intake Tulip20ºIntake Overall Length3.315″Exhaust Head Diameter31.00mm / 1.220″Exhaust Stem Diameter5.0mm / 0.1957″Exhaust Tulip20ºExhaust Overall Length3.310″RemarksStandard if you have any Questions regarding this product please E-Mail [email protected]