JEGS 555-813418 Cylinder Head Bolt Kit Features:

• Fits 2014-2017 Chevrolet Silverado and GMC Sierra 1500, Express and Savana 2500, 3500 with 4.3L V6 Engine
• OE-Style for rebuild or stock build use
• Torque-to-yield type fasteners designed for single use
• Ideal for engine repair when changing heads or head gaskets
• Excellent tensile strength and fatigue resistance
• Enhanced heat and corrosion resistance
• Includes sealant on threads
• Includes one set of 16 bolts for servicing (2) cylinder heads

JEGS 555-83418 Cylinder Head Bolt Kit Notes:

• Torque-to-Yield (TTY) head bolts are a one-time-use fastener — once torqued down, they've been intentionally stretched beyond the point of no return. That permanent stretch is exactly what creates the clamping force holding your head gasket in place, but it also means the bolt is spent. Try to reuse it, and you're gambling on a fastener that's already been pushed past its limit.
• Replaces GM part number 15546959