Fel-Pro Exhaust Manifold Hardware Kit for Chevrolet Silverado 1500 — ES 75120, Coated Fasteners & Self-Locking Nuts

FEL-PRO ES 75120 is an application-specific exhaust manifold hardware kit built to restore secure, vibration-resistant connections on compatible V8 trucks and SUVs.

This hardware kit supplies the fasteners, nuts and coated components needed when replacing an exhaust manifold or repairing the exhaust connection on many GM and related platforms. FEL-PRO designs these kits to match the original mounting layout and to resist corrosion in the high-heat exhaust environment, giving you parts that are ready to install without modification.

What vehicles and repairs is this kit intended for?

The kit is made to fit a range of late-model GM and related vehicles that share similar exhaust flange hardware, including multiple full-size trucks and SUVs. It’s commonly used when replacing a cracked or leaking manifold, upgrading exhaust components, or renewing fasteners during engine work. Always confirm fit by cross-referencing your vehicle year, make, model and engine before ordering.

• Designed for late 2000s GM trucks and SUVs (cross-application compatibility listed by FEL-PRO).
• Application-specific contents match original mounting patterns and thread sizes.
• Useful for manifold replacement, exhaust flange resealing or hardware refresh jobs.

How does the kit resist corrosion and loosening under heat?

FEL-PRO applies a proprietary organic coating to the metal hardware to inhibit rust and extend service life in the hot, corrosive exhaust environment. Critical fasteners are supplied with a controlled friction finish to ensure predictable torque and reduce the chance of backing off from thermal cycling. Where required, the kit includes self-locking nuts to maintain clamp load without adhesives.

• Proprietary organic coating reduces surface rust formation.
• Tightly controlled coefficient of friction for consistent torque values.
• Self-locking nuts included where applicable to prevent loosening.

What exactly comes in the kit and how do I know it will be complete?

Each ES 75120 kit is packaged with application-specific components tailored to the original equipment configuration. FEL-PRO inspects the contents to match the factory hardware layout so you get the correct lengths, thread types and any specialty pieces. For exact item counts and part types, check the kit's packing list or the vendor product page before purchase.

• Application-specific assortment of bolts, nuts and washers matching OE patterns.
• Specialty coated pieces for enhanced durability in exhaust service.
• Packaged for straightforward installation with common tools.

Will this kit make installation easier for a DIYer or shop technician?

The kit simplifies installation by providing the correct hardware so technicians and experienced DIYers avoid field substitutions that can lead to leaks or failure. With matching fastener geometry and locking features where needed, it reduces guesswork and cleanup time during manifold replacement. Standard hand tools are sufficient for most installations, though a torque wrench is recommended to meet specified clamp loads.

• Right-fit components reduce on-car adjustments and trial-and-error replacements.
• Self-locking elements limit rework from loose fasteners after heat cycles.
• Recommended: torque wrench for accurate installation and long-term reliability.

Who is this for: FEL-PRO ES 75120 is intended for mechanics, restoration shops and knowledgeable DIYers working on compatible full-size trucks and SUVs who need OE-style replacement exhaust manifold hardware. It’s a practical choice when you want correct-fit fasteners with corrosion-resistant finishes and locking features to restore a secure exhaust connection without sourcing individual parts.