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NGK 97637 DCPR7EIX NGK Iridium IX Spark Plug (2 Pack)





  • NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response.
  • NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability.
  • The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloys extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to a NGK RUTHENIUM HX plug.



  • (2007-2003) AMERICAN IRON HORSE
  • (2008-1997) BMW
  • (2009-1987) BUELL
  • (2009-1985) HARLEY-DAVIDSON
  • (2005)           TITAN
  • Snowmobile
  • (2002) ARCTIC CAT
  • Outboard Engine
  • (2003-1995) EVINRUDE 
  • (2004-1995) JOHNSON 


Center Electrode Core MaterialCopper Core
Center Electrode Tip MaterialPlatinum
Ground ConfigurationStandard
Ground Electrode Core MaterialNickel Core
Ground Electrode Quantity1
Ground Electrode Tip DesignTrapezoid
Hex Size5/8 in
Insulator Height50.50 mm
Manufacturer Heat Range5
Part NumberBKR5EGP
Pre-Gap Size.040 in
Reach.75 in
Resistance5000 Ohms
Seat TypeFlat
Stock Number7090
Thread Diameter14.00 mm



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