Bosch 4458 HGR8DQP 0242229621 Platinum Spark Plug

Heat-fused platinum center electrode reaches self-cleaning temperature quickly and reduces electrode wear. Tapered, yttrium-enhanced ground electrode extend service life and improve access to air/fuel mixture. Nickel-plated rolled threads provide anti-seize and corrosion protection.

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeTapered
• Reach17.5mm (.689")
• Hex Size5/8" (16mm)
• Terminal TypeRemovable Nut
• Gap.063" (1.6mm)

• Center Electrode
• MaterialPlatinum
• TypeStandard
• Size2.5mm
• ProjectionProjected

• Ground Electrode
• MaterialNickel
• TypeSurface Discharge
• Quantity4

• Specifications
• ResistorYes
• Heat Range8
• Torque SpecsCast Iron: 15-29 lb. ft. Aluminum: 8-14 lb. ft.

• Part Information
• BrandBosch
• WarrantySatisfaction Guarantee
• Longevity50k Miles

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