Choosing the right exhaust manifold bolts ensures a secure seal, durable performance, and easier maintenance for GM LS, LT, and related engines. This guide highlights top-rated bolt kits and hardware sets designed for heavy-duty use, corrosion resistance, and reliable torque retention. Explore five dependable options below, each with key features and compatibility details to help you select the best fit for your vehicle.
| Product | Brand | Key Feature |
|---|---|---|
| 551696 Exhaust Manifold Bolts | BEONEO | 10.9 high-strength, galvanized with black coating for corrosion resistance |
| SWQS 12PCS ES75120 Bolts Kit | SWQS | Broad compatibility across GM and GMC models, heavy-duty 10.9 grade |
| CHENACC 75120 Hardware Kit | CHENACC | Grade 10.9, anti-corrosion finish, multiple OEM-number cross-refs |
| Dorman 03413B Exhaust Manifold Hardware Kit | Dorman | Direct replacement, reliable long service life |
| Fel-Pro ES 75120 Hardware Kit | Fel-Pro | Compatibility guidance and manufacturer-backed fit |
BEONEO 551696 Exhaust Manifold Bolts
The BEONEO 551696 bolt kit is designed for GM LS1, LS3, LS2, LSX, and LT series engines from 1997 onward. It includes 12 high-strength bolts rated at 10.9, offering heavy-duty performance and durable corrosion protection with a galvanized finish and a special black coating to resist thread seizure. The kit is stated to replace 551696, ensuring compatibility across a wide range of GM LS and LT engines. Installation guidance emphasizes robust torque retention and reliable exhaust system sealing in demanding thermal environments.
SWQS ES75120 12PCS Exhaust Manifold Bolts Kit
The SWQS ES75120 set targets a broad spectrum of GM and GMC configurations, including Silverado, Suburban, Tahoe, and Sierra models, with compatibility spanning LS and LT engines. The kit emphasizes 10.9-grade bolts and comprehensive coverage for heavy-duty exhaust manifold mounting. Its extensive compatibility list covers a wide array of year ranges and model lines, helping reduce the need for multiple purchases during repairs or upgrades.
CHENACC 75120 Exhaust Manifold Bolts Hardware Kit
CHENACC’s 75120 hardware kit targets LS-series engines and cross-referenced OEM part numbers to ensure broad compatibility across Chevrolet, GMC, Buick, and other brands within GM families. The bolts are Grade 10.9 with a polished exterior finish designed to resist corrosion and harsh engine compartment conditions. The kit’s design focuses on fitment versatility and durable engagement in tight spaces, offering a reliable option for professional and DIY installations alike.
Dorman 03413B Exhaust Manifold Hardware Kit
This Dorman kit provides a direct replacement for specific models requiring the 03413B hardware. It is positioned as a reliable solution for missing, damaged, or failed original hardware on compatible vehicles, with durable construction intended to deliver stable performance over the long term. The kit’s focus is straightforward compatibility and dependable service life for exhaust manifold mounting.
Fel-Pro ES 75120 Exhaust Manifold Hardware Kit
Fel-Pro ES 75120 focuses on enabling correct fitment for several GM applications, including Silverado 1500 models. The kit emphasizes compatibility confirmation through the “Amazon Confirmed Fit” bar and provides guidance to ensure correct application. It’s designed to meet the needs of exhaust system repair with parts built to endure the stresses of engine heat and vibration while maintaining a proper seal and alignment.
Dorman 03309 Exhaust Manifold Hardware Kit
Dorman 03309 is presented as another direct replacement option for select models requiring reliable exhaust manifold hardware. Like other Dorman kits, the focus is on durability, long service life, and dependable performance in demanding engine environments, with parts designed to match OEM specifications for trusted fit and function.
MOXRUQ 10 PCS Exhaust Manifold Bolts
MOXRUQ offers a compact 10-piece set of M8 x 1.25 x 30mm high-strength carbon steel flange bolts. The high-strength Grade 10.9 construction ensures robust performance under high-temperature exhaust conditions. The anti-slip hexagonal design aids installation and reduces tool slippage, supporting efficient repairs and replacements across applicable LS/ LT engine configurations.
Buying Guide: Key Purchase Considerations
- Material and grade: Look for high-grade steel (Grade 10.9) or equivalent for strength and heat resistance to prevent bolt stretching or fatigue under exhaust temperatures.
- Coatings and corrosion resistance: Galvanized finishes or specialized coatings reduce thread seizure and corrosion, extending service life in harsh engine bays.
- Compatibility: Confirm fitment against your specific GM model, engine family (LS, LT), and year. Use listings with “Amazon Confirmed Fit” or OEM cross-reference numbers where available.
- Kit contents: Some sets include a full hardware kit (bolts, nuts, washers) for a complete replacement; others may be partial. Choose based on installation needs.
- Installation considerations: Tolerances, thread pitch (e.g., M8 x 1.25), and bolt length affect proper sealing and torque requirements. Ensure you have the right tools and torque specs.
- Brand and warranty: Reputable brands with documented fitment and warranties can reduce risk during repair projects.
- OEM cross-references: If substituting OEM parts, verify cross-reference numbers to avoid misfit or compatibility issues.
When selecting exhaust manifold bolts, prioritize compatibility with your engine, durability under heat, and corrosion resistance. A high-quality kit can simplify installation, extend service life, and help maintain a reliable exhaust seal across GM LS and LT engines.