Answering the common buyer query, this guide highlights top serpentine belt conversion kits that are best for Chevy small block builds, plus universal options. It targets builders aiming to upgrade pulleys, brackets, and drive components for improved belt grip and reliability. Each pick is evaluated for compatibility, installability, and value. The top five selections emphasize complete or near-complete kits, allowing easy installation and better performance for engine bays with SBC powerplants.
| Product | Best For | Why Picked |
|---|---|---|
| SBC Serpentine Pulley Conversion Kit with AC, PS, and Alternator — CVF Racing | Full SBC drive system upgrades | All-inclusive kit with pulleys, brackets, water pump, AC, PS, and more |
| Chevy Small Block Serpentine Conversion Kit — Alternator & Power Steering, CVF Racing | Alternator & PS upgrades | 8-rib pulleys, complete brackets, hardware; belts sold separately |
| Chevy Small Block Serpentine Conversion Kit — Polished Billet Pulleys & Brackets, 8 Rib (Long Water Pump) — TENGBASE | Show-quality finish and strong belt grip | Polished billet aluminum, 8-rib design, complete hardware |
| Gates 90K-39083A Complete Serpentine Belt Drive Kit | OEM-style replacement | Integrated kit to align tensioner and pulleys with belts |
| ACDelco Gold ACK040378HD Serpentine Drive Belt Tensioner Kit | GM fitment and tensioner upgrade | GM-aligned tensioner kit with reliable build |
SBC Serpentine Pulley Conversion Kit with AC, PS, and Alternator
Best for a complete SBC upgrade, this all-inclusive kit provides pulleys, brackets, belt, water pump, AC compressor, power steering pump, and more. It is ideal for builders who want a turnkey conversion that minimizes sourcing separate components. The American-made 6061-T6 billet aluminum construction emphasizes durability under high RPM operation. Best for: full drive-system upgrades in small-block Chevy builds.
Limitations: belts and some accessories may be required separately depending on the exact engine configuration. Consider this if you already own some components or prefer partial kits.
Chevy Small Block Serpentine Conversion Kit — Alternator & Power Steering
Best for SBC builds focusing on alternator and power steering upgrades, this CVF Racing kit includes polished billet aluminum pulleys and brackets. It features 8-rib pulleys to reduce belt slip and improve grip. It’s well-suited for show-quality installations where aesthetics matter as much as performance. Best for: SBC fans upgrading electrical and steering drive without replacing every accessory.
Limitations: belts and accessories are not included, so buyers should budget for those parts separately.
Chevy Small Block Serpentine Conversion Kit — Polished Billet Pulleys & Brackets (Long Water Pump)
Best for show-ready SBC builds requiring a high-end finish and robust strength, this kit uses polished billet aluminum pulleys and CNC-machined brackets. The 8-rib design improves belt grip, reducing slippage at high RPMs and maintaining stable alternator output and power steering. Best for: enthusiasts seeking premium components for long-water-pump SBC engines. Belts and accessories sold separately for customization.
Gates 90K-39083A Complete Serpentine Belt Drive Component Kit
Best for reliable, factory-style replacement, this Gates kit emphasizes coordinated tensioners and pulleys with a belt replacement plan. It stresses that neglecting to replace tensioners and pulleys alongside the belt can shorten drive-system life and risk breakdowns. Best for: practical upgrades where reliability and straightforward maintenance are priorities.
Limitation: includes components that may require separate belts or additional accessories depending on the specific SBC setup.
Gates 90K-38274A Complete Serpentine Belt Drive Kit
Best for drivers replacing the entire drive system with Gates components, this kit centers on tensioners and pulleys coordinated with the belt. It is aimed at reliability-conscious shoppers who want a cohesive Gates solution and a smoother installation path. Best for: ensuring accessibility and consistent belt tension across the drive system. Belts sold separately.
Buying Guide
What should you consider when choosing a serpentine belt conversion kit for a Chevy small block?
- Total kit scope: Do you want a complete system (pulleys, brackets, water pump, compressor, and pump) or a partial kit?
- Belt compatibility: Confirm the number of ribs (6, 8, etc.) and whether belts are included or sold separately.
- Material quality: Billet aluminum kits typically offer show-quality finishes and durability, but can be pricier.
- Accessories and compatibility: Some kits require separate belts, alternators, or pumps tailored to your engine build.
- Maintenance considerations: Tensioners and pulleys should be replaced with belts to maximize drive life.
- Installation effort: Some kits are “plug-and-play” while others require custom fitting or additional hardware.
Frequently Asked Questions
- What is a serpentine belt conversion kit? A kit that replaces or upgrades the belt drive system, including pulleys, brackets, and sometimes pumps and accessories, to improve belt grip and reliability.
- Do I need belts with a serpentine kit? Some kits include belts; others require you to source belts separately based on engine and accessories.
- Which SBC years are compatible? Compatibility depends on engine displacement, water pump configuration, and accessory layout; verify with product specifics.
- Are polished billet pulleys worth it? They offer a premium look and corrosion resistance, but the performance gain is typically related to belt contact and stability.
- What maintenance steps are essential? Replace tensioners and pulleys when replacing belts to prevent premature wear and slippage.
- Can I reuse existing accessories? Some kits are designed to work with existing alternators and PS pumps, while others require new components; check the kit details.