Bosch Platinum+4 Spark Plug 4478 - Read Reviews on Bosch Platinum+4 #4478

Bosch Platinum+4 Spark Plug

Vehicle Specific

Part Number: 4478
Features & Benefits

BOSCH OE fine wire double platinum: BOSCH double platinum spark plugs utilize a platinum tip on both the center and ground electrodes to provide long life, while meeting Original Equipment specifications for double platinum spark plugs.

  • Revolutionary surface air gap firing technology featuring multiple spark paths that delivers the longest, most powerful spark for ultimate engine performance
  • More platinum vs. BOSCH Platinum Plus for smoother acceleration, top fuel economy and maximum engine power
  • Four yttrium enhanced ground electrodes provides optimum access to the air/fuel mixture for the most efficient combustion, plus the yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
  • Electrode gap is factory set which never requires adjustment and ensures ease of installation
Product Details
Part Number: 4478
Weight: 0.10lbs
Center Electrode Core Material: Nickel-Yttrium and Copper and Platinum
Center Electrode Tip Material: Platinum
Drive Size: 20.8mm
Ground Electrode Tip Material: Nickel-Yttrium
Insulator Material: Ceramic
Insulator Type: Projected
Manufacturer Heat Range Number: 8
Package Quantity: 1
Resistor: Yes
Seat Style: Gasket
Thread Size: 19 mm
Shipping Information: Overnight and Two Day shipping are not available for PO Box, APO/FPO/DPO or US Territory addresses.
Rebate details: AUTO1389 AutoZone Rebate. Purchase 4 or more Bosch Platinum, Double Platinum or Iridium Spark Plugs on the same receipt between 07/25/17 and 08/21/17 to claim a $10 AutoZone Gift Card.
  • Overall

    Bosch Platinum+4 Spark Plug


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