Crankshaft Pulley for Chevrolet/GMC Small-Block V8 305/350 — 12551537

What Makes This Pulley Stand Out

This crankshaft pulley (also referred to as a harmonic balancer or vibration damper) is manufactured to meet or exceed OEM specifications. It is designed to absorb crankshaft torsional vibrations, protect engine components, and deliver reliable long-term performance for GM small-block V8 vehicles. Each unit undergoes strict quality control to ensure dimensional accuracy and balanced operation.

• Direct OEM replacement for GM small-block V8 engines — Chevrolet/GMC 305 (5.0L) and 350 (5.7L) — exact fit, no modifications required
• Factory degree markings for accurate ignition timing adjustment
• Integrated rubber vibration damper reduces engine vibration and extends belt service life
• Precisely balanced for smooth V8 operation from idle to redline
• Anti-corrosion surface treatment for long-term durability

Product Specs at a Glance

Vehicle Cross-Reference & Application Guide

This crankshaft pulley fits a wide range of GM vehicles from the classic era. Always verify fitment using your original part number:

Compatible with both manual and automatic transmission variants. Also cross-references Dorman 594-012. Please verify your original part number matches 12551537 or 6272221 before ordering.

Reasons to Buy from Us

• OEM-level quality at aftermarket pricing — manufactured on the same production lines that supply major automotive brands, ensuring consistent quality without the dealership markup
• Extended service life — premium rubber bonding between hub and outer ring prevents separation and cracking under high heat and sustained RPM loads
• Strict quality inspection — every unit is dynamically balanced and measured against OEM blueprint specifications before shipment
• Fast worldwide shipping — well-stocked inventory ensures short lead times for both sample orders and bulk purchases

How to Reach Us / Quick Inquiry

For pricing, bulk discounts, or technical questions, please contact us directly:

• Send an inquiry with the OEM part number and quantity required
• We respond to all inquiries within 24 hours on business days
• Custom packaging and private labeling available for volume orders

E-mail: info@CPTautoparts.com | sales@CPTautoparts.com