• Manufactured with durability in mind
• MSD 8471 - Bronze Gear - .500" ID
• MDS 8531 - Iron Gear - .500" ID
• MSD 8561 - Melonized Gear - .500" ID - (Crate Engines)
• MSD 8472 - Bronze Gear - .006 Oversized
Chevy Distributors with .500" Shaft
Special Alloy creates high-strength gear teeth for less wear