ARP 134-3609 High Performance Series Cylinder Head Bolt Kit GM LS Gen III

The ARP 134-3609 cylinder head bolt kit is specifically designed for Gen III LS engines (1997-2003), including 4.8L, 5.3L, 5.7L, and 6.0L applications. These high-performance fasteners are rated at 180,000 psi—15 percent stronger than Grade 8 fasteners, providing the superior clamping force needed for both street and performance engine builds.

Key Features:

• Cold-forged to ensure molecular integrity and heat-treated prior to thread rolling and machining
• Reduced wrenching hex head design eliminates the need for valvetrain removal when re-torquing cylinder heads
• Wide area flanged head for improved load distribution
• Includes hardened parallel-ground washers for even load distribution and accurate torque readings
• Designed with two different bolt lengths for 2003 and earlier LS engines, and unlike stock head bolts, these can be reused
• Black oxide finish for corrosion resistance
• Manufactured from premium chromoly steel

This complete kit includes enough fasteners and washers to secure both cylinder heads. The precision manufacturing and superior materials ensure reliable performance in demanding applications, helping to prevent head gasket failures while maintaining consistent clamping force. ARP's stringent quality control meets their zero-defect, zero-failure standard, making these fasteners a trusted choice for professional engine builders and performance enthusiasts.