Butler Performance Inc. - Distributor Gears

Ignition/Electrical - Distributor Gears

This is from Holley/MSD engineering:

The PRD13906 is machined from 1144 Cold Rolled Steel, and it is case hardened via salt bath ferritic nitrocarburizing – what we refer to as QPQ. It then has a Black Oxide conversion coating applied for corrosion resistance.

Melonizing is a trade-name specific version of salt bath ferritic nitrocarburizing – so technically, no – MSD gears aren’t melonized. However, they undergo a process that is functionally equivalent.

Not knowing the exact material of the steel billet roller cams, I would not take a chance – especially since we have no way to test beforehand. I would recommend the Bronze or Polymer gears to be safe on roller cams.

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Items 1-7 of 7
Description: Pontiac Polymer Dis. Gear -0.491 (Use with Factory GM HEI / Points & Mallory / Mallory Must Be Drilled for Larger Dia Pin)
Item #: BOP-PDG37
Condition: New
Price: $149.95

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Description: Pontiac Polymer Dist. Gear - .500, for MSD, Pertronix, Holley, FAST Dist Only
Item #: BOP-PDG38
Condition: New
Price: $149.95

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Description: Comp Bronze Distributor Gear for HEI/Points/ TSP/ Mallory/Unilite .491" ID
Item #: CCA-451
Condition: New
Price: $74.95

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Description: Bronze Distributor gear for MSD 8563 Pontiac Distributor For racing roller cams Distributor Shaft Diameter: 0.500 in.
Item #: MSD-85631
Condition: New
Price: $94.35

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Description: Replacement Distributor gear for MSD 8563 Pontiac Distributor
Item #: MSD-8531
Condition: New
Price: $43.62
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Description: Replacement Distributor gear for Stock .491 Shaft Pontiac Distributor
Item #: BPI-Dist-Gear-491
Condition: New
Price: $44.97
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Description: RAV / 455SD ONLY Composite Distributor Gear
Item #: BOP-PDG39
Condition: New
Price: $219.95

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Items 1-7 of 7