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25% Off All Online Orders of Select Parts and Accessories
Receive 25% Off Your Online Purchase. Use promotional code 25PEP at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 12/12/16. Online orders scheduled for in-store pick up must be completed by closing on 12/11/16 for discount to apply.

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69_700_37204
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  • Part #: 37204|
  • SKU: 1163490

Available today after 6 p.m.


    • Proprietary plug design inside and out
    • Designed for use on high performance vehicles that utilize high output ignition systems
Retail
$35.99
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MSD Spark Plug, 4 Per Package, 6IR4Y

MSD's Sparkplugs are engineered to improve the efficiency of the combustion process to create the most power possible combined with increased durability. The center tip of the plug is made from iridium to promote the best spark and increase resilience. A proprietary ceramic material enhances the dielectric strength of the plug housing forcing the spark, even under extreme cylinder pressures, to jump across the gap to the ground electrode. This electrode is machined to expose more spark to the incoming gases to promote the most effective combustion event possible.
  • Proprietary plug design inside and out
  • Designed for use on high performance vehicles that utilize high output ignition systems
  • Machined electrode increases exposure to the flame to improve combustion
  • MSD's Proprietary ceramic formula provides the highest dielectric strength
  • Yttrium Copper ground electrode reduces the chance of pre-ignition
  • Iridium tip improves colds starts
  • Designed to outlast other performance plugs on the track or on the street
  • All spark plugs tested prior to packaging and shipping


Wrench Dia. Inches
8-May
Resistor
Yes
Quantity
Set of 4
Plug Thread Size
14mm
Electrode Tip Material
Iridium
Ground Strap
Single
Electrode Core Material
Iridium
Manufacture Heat Range
4
Shorty Style Plug
No
Insulator Type
Projected
Plug Seat Style
Tapered
Spark Plug Reach Inches
0.437

1163490