Ignition Systems - Distributors

Drive Gear replaces MerCruiser part # 43-818807

Used with Distributor Assembly – Thunderbolt IV & V

Drive Gear Shimming Tool replaces MerCruiser part # 91-60523

Measures upper drive gear clearance on MC-1 / R / MR / Alpha One / Alpha One Gen II

• Same high output assem­bly that is currently found in all MSD Distributor. 
• Supplied with the two pin connector installed

Replacement ignition module for Run Ready Distributor Ignition Systems 121-3606.

• 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.

• 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.

Pertronix billet distributor module, it fits all of the standard Pertronix billet distributors.

These reverse rotation distributor gears fit Chevy V-8's and V-6's, made of ductile iron for strength Resists wear and breakage, even when used with a heavy duty oil pump Fits Pertronix, Maxvolt, MSD and more distributors with .500" shafts.