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BOSCH 9651  
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BOSCH 9651 Specifications
Center Electrode Core MaterialNickel-Yttrium and Copper and Iridium
Center Electrode Tip MaterialIridium
Gap Size1 mm
Ground ConfigurationStandard
Ground Electrode Quantity1
Ground Electrode Tip DesignTapered
Ground Electrode Tip MaterialNickel-Yttrium and Iridium
Hex Size16
Insulator MaterialCeramic
Insulator TypeProjected
Manufacturer Heat Range8
Package ContentsSpark Plug
Package Quantity1
Reach19 mm
Seat TypeFlat
Short StyleNo
Spark Plug Type4-Cycle
Thread Diameter14 MM
OE Fine Wire Double Iridium
Bosch OE Fine Wire Double Iridium. All iridium plugs are NOT created equal. The ultra fine wire design and laser welded, tapered ground electrode deliver the ultimate in ignitability and high performance. The iridium-alloy center electrode firing pin and laser welded ground electrode with iridium alloy inlay help it to go the distance.

Features & Benefits:
  • Double Iridium electrodes - iridium firing pin and iridium ground electrode inlay offer higher performance and 4 times longer life compared to standard copper spark plugs
  • OE Fine Wire design requires up to 24% less voltage to ignite
  • 360 degree continuous laser welding increases durability for increased life
  • Copper core provides broader heat range to resist pre-ignition and fouling
  • Pre-gapped and nickel plated threads allow for quick installation without adjusting the gap or applying anti-seize
  • Tapered ground electrode allows for better ignition throughout the life of the spark plug

Bosch Iridium Spark Plug Highlights

Which Spark Plug Is Right For You?

Material Cost Performance Lifespan Highlights
$$$ · Ultimate Ignitability & Durability
· Fast Throttle Response & Best Cold Starts
$$ · Improved Starts & Acceleration
· More Power & Better Fuel Economy
Double Platinum
$$ · Improved Efficiency
· Good For Waste Spark Systems
$ · Reduced Carbon Build-Up
· Good for Coil-On-Plug Systems
$ · Good Conductor
· Least Durable

Failure Conditions & Remedies
Proper Torquing Techniques
Proper Gapping Techniques

Warranty Information:
12 Months Satisfaction Guarantee for Double Iridium, Double Platinum, and Platinum Spark Plugs Only
Warranty Details