MSD 8472 Oversize Bronze Chevy Distributor Gear +0.006" AMPCO 45

The MSD 8472 is a +0.006" oversize bronze distributor gear engineered for Chevrolet engines equipped with camshafts that require a bronze-compatible gear material. Precision gear mesh is essential to ignition timing accuracy, and this oversized gear is designed to achieve proper camshaft gear engagement where a standard-size gear would be insufficient.

Machined from AMPCO 45 aluminum bronze alloy with 5% nickel, this gear delivers outstanding impact resistance and wear durability without damaging billet or roller camshafts the way steel or iron gears can. The special alloy composition produces high-strength gear teeth capable of withstanding the demands of high-volume oil pump applications.

Key Features:

• +0.006" oversize outer diameter for proper camshaft gear mesh
• Machined from AMPCO 45 aluminum bronze containing 5% nickel
• Designed for MSD distributors with a 0.500" diameter shaft
• Compatible with Chevrolet small block, big block, and V6 engines
• Kit includes a rolled roll pin and gear break-in lubricant
• Oversize stamped on lower portion of gear for easy identification
• Recommended for race and performance use — not intended for extended street use

The MSD 8472 is sold individually and is legal for sale or use on emissions-controlled, non-emissions-controlled, and race-only vehicles. For engines where the camshaft bore has been worn or machined beyond standard tolerances, this +0.006" oversize gear restores the tight mesh needed for precise, repeatable ignition timing.