MSD-85852 #1

Distributor Gear Iron .531in 351w

MSD IGNITION  |  Part# MSD-85852

10 in stock

Distributor Gear, Iron, Ford 351w, .531 I.d. - Gear Is Ductile Iron, Micro Polished And Melonite QPQ Coated For Reduced Wear, Friction And Initial BREAK-IN



A distributor’s performance is only as good as its drive gear. MSD Ignition has put a great deal of effort into researching and testing a variety of metallurgical compositions, heat treating and coatings to provide you with a durable, accurate and strong distributor gear. MSD engineers have built test fixtures and spent hundreds of hours testing and evaluating the metallurgy of our gears. The result is a special iron alloy gear that is treated to a low-friction coating process.


  • Increased outer hardened layer thickness (RC 55-60)
  • Micro polished surface for smooth contact
  • Proprietary formulated ductile iron
  • Melonite QPQ coated reduces friction and initial wear
  • Interstitial carbide concentration improves wear resistance and running properties

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  · Ignition & Electrical » Distributor Accessories