Upgrade your 2017-2025 Chevy/GMC 6.6L L5P Duramax Diesel with the Gator Fasteners HD220 Heavy Duty Up-Pipe Bolt Kit (UPBK66L5P). Engineered from Gator's exclusive HD220 alloy, these bolts deliver industry-leading tensile strength (220,000+ PSI), far surpassing standard 10.9 and 12.9 grade fasteners.

This ensures your up-pipe connections remain secure and leak-free, even under the extreme heat and vibration of modern diesel engines.

This comprehensive kit includes all the bolts required for both the up-pipe to exhaust manifold and the up-pipe to turbo pedestal connections, providing a complete hardware solution for your exhaust upgrades or repairs.

The corrosion-resistant black oxide finish ensures long-lasting protection against rust and exhaust byproducts. Each bolt is precision-machined for a direct fit, making installation straightforward and reliable.

Vehicle Compatibility: Fits 2017-2025 Chevy Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L L5P Duramax Diesel engine.

• HD220 High-Strength Material - Proprietary alloy with 220,000+ PSI tensile strength for unmatched durability
• Complete Up-Pipe Hardware - Includes all bolts needed for both up-pipe to exhaust manifold and up-pipe to turbo pedestal connections
• Engineered for Extreme Conditions - Withstands high heat, thermal cycling, and vibration in demanding diesel exhaust environments
• Corrosion Resistant - Black oxide finish protects against rust and exhaust byproducts
• Precision Fit - Direct replacement for factory hardware on 2017-2025 Chevy/GMC 6.6L L5P Duramax engines
• Gator Fasteners Quality - Backed by Gator Fasteners' commitment to top-tier strength and reliability - Nothing Bites Like Gator