Product Summary

Spiral Core Conductor Style, 8.5" Diameter, Black

  • There are close fit 8.5mm wires for MSD Pro Mag
  • Each foot of finished wire features 40 ft. of tight wound copper
  • Has a helically wound core and produces just 40-50 ohms of resistance per foot
  • Features high temp boots, dual crimp stainless steel terminals feature snap locks for a secure fit
  • The 8.5mm synthetic/silicone jacket over extra heavy glass braid and dielectric insulator keeps current guided to plugs
See more details

Key Specs

MFG. Part #31543
Conductor StyleSpiral Core
Diameter8.5"
Cap Terminal StyleHEI / Male
Cap TypeHEI / Male
See more specs

Need To Know

Quick and Easy Returns

Return Policy

MSD 31543 Details

These close fit spark plug wires will work great with your MSD Pro Mag magneto. They feature a helically wound core, just 40-50 ohms of resistance per foot, RFI suppression equal to a 1500 ohm wire, high temp boots, and dual crimp stainless steel terminals feature snap locks for a secure fit.

  • Close fit 8.5mm wires for MSD Pro Mag
  • Helically wound core, just 40-50 ohms of resistance per foot, RFI suppression equal to a 1500 ohm wire
  • Each foot of finished wire features 40 ft. of tight wound copper
  • 8.5mm synthetic/silicone jacket over extra heavy glass braid and dielectric insulator keeps current guided to plugs
  • High temp boots, dual crimp stainless steel terminals feature snap locks for a secure fit

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

MSD 31543 Specifications

KEY SPECS
MFG. Part #31543
BrandMSD
Conductor StyleSpiral Core
Diameter8.5"
Cap Terminal StyleHEI / Male
Cap TypeHEI / Male
GENERAL
Spark Plug Wire ColorBlack
Spark Plug Boot Ends90 Degree
RFI SuppressionYes
Coil Wire IncludedYes
Wire Routing TypeUniversal
Spark Plug Wire Resistance50 ohms/ft.
GTIN Code085132315437
Sold in QuantitySet

Questions & Answers

Customer Impersonation Script