Bosch 7421 HR9LI33U 0242225628 Iridium-Platinum Spark Plug

Ultra fine wire center electrode increases ignitability and reduces spark quenching. Fused iridium and platinum center electrode provides exceptional wear resistance. Copper core helps prevent pre-ignition and fouling. Nickel-plated shell and rolled threads provide anti-seize and corrosion protection. Ribbed insulator prevents flashover.

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeTapered
• Reach17.5mm (.689")
• Hex Size5/8" (16mm)
• Terminal TypeSolid
• Gap.039" (1.0mm)

• Center Electrode
• MaterialIridium
• TypeFine Wire
• Size0.6mm
• ProjectionProjected

• Ground Electrode
• MaterialNickel
• TypeStandard
• Quantity1

• Specifications
• ResistorYes
• Heat Range9
• Torque SpecsCast Iron: 15-29 lb. ft. Aluminum: 8-14 lb. ft.

• Part Information
• BrandBosch
• WarrantySatisfaction Guarantee
• Longevity100k Miles

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