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Vehicle Info NeededMSD IGNITIONPART NUMBER: 121-8561
Distributor Gear Chevy Marine
$12095
More than 10 available
Ships on Nov 02, 2026
Lowest Price GuaranteeGM
- Distributor Gear
- Chevy Marine
- .500" ID
- Melonized Steel
Features: - Increased outer hardened layer thickness (RC 55-60)
- Proprietary formulated ductile iron
- Melonite QPQ coated reduces friction and initial wear
- Interstitial carbide concentration improves wear resistance and running properties
- Melonized for roller cam use
- 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
Iron Gears
High grade iron and steel replacement gears for MSD distributors. Burnished for a smooth scuff-free finish and are machined from a proprietary, high density material.
Bronze Gears
Machined from quality AMPCO-45 aluminum bronze containing 5% nickel. This special material creates high strength gear teeth that are less prone to wear when used with high volume oil pumps.
Part TypeDistributor Drive Gear
Product LineMSD Distributor Gears
BrandMSD IGNITION
Package Height1.5
Package Width5.8
Package Length8.1
Weight0.35 PG
Part CategoryPerformance Parts
Distributor Gear MaterialSteel
QuantitySold individually
Drilling RequiredNo
Part FitmentSemi Universal
Roll Pin IncludedYes
Vendor Part Number8561
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
