Cylinder Head Service Kit, 0.440″ Lift, Honda®, CRF™ 450X, 2005-2017 # 30-33450

DescriptionKPMI® is proud to introduce full CYLINDER HEAD SERVICE KITS. These kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt / MX and Side x Side models with KPMI’s top quality racing valvetrain components. Features: • Save time money on your next cylinder head rebuild • One package, everything you need for factory recommended valvetrain service • Double your service life over OEM using KPMI® Valvetrain products • Kitted with value added savingsKit Includes: • Dual Spring Titanium Retainer Spring Kit, Which Allows for 0.440″ Valve Lift • Top End Gasket Kit by Cometic • KPMI® C674 Bronze Standard Valve Guides • KPMI® S.S. Black Diamond™ Valves, Stock Head Dia.The product image may not be accurate on the page. Please refer to the description and specifications before purchasing.Installation InstructionsClick HereTypeIntake / 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 Diameter35.00mm / 1.378″Intake Stem Diameter0.2158″Intake Tulip20ºIntake Overall Length3.315″Exhaust Head Diameter30.00mm / 1.181″Exhaust Stem Diameter0.1957″Exhaust Tulip20ºExhaust Overall Length3.310″RemarksStandardGuide TypeIntake / ExhaustGuide MaterialC674 BronzeReferenceSee Figure 1Intake Outside Dia.: (G)0.4360″ / Std.Intake (A)0.495″Intake (B)0.520″Intake (C)0.650″Intake (D)0.760″Intake (E)0.480″Intake (F)0.2155″Exhaust Outside Dia.: (G)0.4360″ / Std.Exhaust (A)0.580″Exhaust (B)0.605″Exhaust (C)0.740″Exhaust (D)0.890″Exhaust (E)0.480″Exhaust (F)0.1955″