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Iridium Spark Plug

14mm - 1.04 in Reach - Gasket Seat - Single Pack

Quantity

PART# 3729

$7.54   Suggested Retail
$6.79   Your Price
Estimated shipping date: 06/18/2019
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Overview

MSD's spark plugs 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 plug 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.

Features:

  • 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 ground electrode reduces the chance of pre-ignition
  • Iridium tip improves cold starts
  • All spark plugs tested prior to packaging and shipping
  • Unique insulator design improves spark isolation
  • Lower voltage Requirements for longer coil life

Specs

BrandMSD
Emission Code2
Heat Range5
Hex Size5/8
LengthStandard
Plug Style Code9IR5L
Product TypeSpark Plug
Projected TipExtended
Quantity1
Reach1.0400
ResistorYes
Seat TypeGasket
StyleIridium
Thread Size14mm
Part Number3729

Emissions

This part is legal for sale and use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it is a direct or consolidated replacement part.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Applications

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    Some parts are not legal for use in California or other states with similar regulations.