ARP 100-3221 Water Pump Pulley Stud Kit 5/16-24 x 2.250" Black 12-Point with Fan Spacer

The ARP 100-3221 is a premium water pump pulley stud kit designed for high-performance and racing applications. This kit features black oxide-coated studs with 12-point heads, combining superior strength with corrosion resistance for reliable engine accessory mounting.

Key Specifications:

• Thread size: 5/16-24
• Overall length: 2.250 inches
• Includes 1.000-inch fan spacer
• 12-point head design for enhanced wrench engagement
• Black oxide finish for corrosion protection
• Manufactured from premium aerospace-grade material

Features and Benefits:

• Superior clamping force compared to standard bolts
• 12-point head allows for easier installation in tight spaces
• Integrated fan spacer provides proper clearance between water pump pulley and cooling fan
• Black oxide coating provides a professional appearance while preventing rust
• Precision thread rolling ensures accurate fit and maximum strength

ARP fasteners are engineered to aerospace tolerances and are the preferred choice of professional engine builders and racers worldwide. This water pump pulley stud kit ensures your critical engine accessories remain securely mounted under the most demanding conditions.