Double belt groove;6-3/8 In. diameter;Identify the water pump by looking at the distance between it and the timing cover, long water pumps are about 1 In. away from the timing cover;Triple chrome plated steel

• Spectre Performance 4418 Double Belt Groove Water Pump Pulley for Small Block Chevy, Chrome
• Chrome

Spectre Performance 4418 Double Belt Groove Water Pump Pulley for Small Block Chevy, ChromeSpectre Performance