Accessory Drive Belt Kits

What's Included in a Serpentine Belt Kit?

A serpentine belt kit bundles the parts that turn your crankshaft into a working accessory drive. You can build or refresh the whole system at once instead of sourcing pieces one by one. Most complete serpentine belt kits include these core components:

• The multi-ribbed serpentine belt, sized by rib count and length for your setup
• A belt tensioner that holds the correct tension as parts wear and heat cycles
• One or more idler pulleys that route the belt cleanly around your accessories
• Mounting brackets that position the alternator, water pump, and power steering pump
• Mounting hardware, including bolts and spacers, to bolt the drive system in place

Some kits add accessory-specific pulleys or upgraded finishes. Others focus on a direct-fit serpentine belt replacement kit. If you need one piece, browse the full pulleys, belts & brackets department or pick up belt tensioners on their own.

Serpentine, Micro-V, and V-Belt Kit Options

The right belt style depends on your pulleys and how much power you transmit. A serpentine belt drive system uses a single multi-ribbed belt to turn every accessory. That saves space and improves grip over older V-belt designs.

A Micro-V belt is a serpentine belt with fine, closely spaced ribs, common on late-model and swap builds. A V-belt kit, such as a V-Trac front drive system, uses V-shaped belts in grooved pulleys for a traditional look. Older engines often ran several separate V-belts, one belt for each driven accessory.

The belt profile and pulley grooves have to agree, so each belt pairs with matching pulleys. Gates supplies both serpentine and V-belt options across many applications. When you know the size you need, order individual replacement belts instead of a full kit.

Complete Kits, Conversion Kits, and Front Drive Systems

These kit families differ by how much of the drive they replace. A complete serpentine belt kit refreshes the belt, tensioner, and pulleys on an existing setup. A serpentine conversion kit swaps an older V-belt engine over to a modern serpentine layout with new brackets and pulleys.

A Front Drive System, or FDS, is a full accessory-drive package. It mounts the alternator, water pump, and other accessories on one coordinated bracket system for tight engine bays and clean styling. Billet Specialties and March Performance build polished and machined-finish systems for show and street builds.

All American Billet offers serpentine and drive-belt solution kits as well. Choose a complete kit for a straightforward refresh, or a conversion kit to modernize an old engine. Pick an FDS when you want the whole front of the engine designed as one unit.

Serpentine Belt Kits for Small Block and Big Block Engines

Fitment is driven by your engine family, because bracket spacing and pulley alignment change from block to block. You'll find serpentine belt kits and serpentine pulley kits for Small Block Chevy, Big Block Chevy, Small Block Ford, LS7, and Ford 5.0L engines. Match a kit to the exact platform you're running.

The kit has to account for your accessories, since adding air conditioning or power steering changes the belt path and pulley count. Spacing between the crank, water pump, and accessory pulleys must line up, or the belt tracks poorly and wears early. If your build mixes parts, confirm each accessory pulley matches the kit's belt profile before ordering.

You can add or replace individual engine accessory pulleys to dial in alignment for your exact combination of components. Check the application listing to confirm your block, heads, and accessory brackets match.

How Do I Choose the Right Serpentine Belt Kit?

Start with fitment, then match the belt and finish to your build. Confirm the kit is designed for your engine family and the accessories you plan to drive. That determines the bracket layout and pulley count.

Next, check the belt itself. Serpentine belts are identified by rib count, commonly four to eight ribs, and by length. The multi-ribbed belt has to match your pulley setup exactly.

Finish and material matter too, from as-cast and black to polished billet, depending on whether the drive shows. Run through a few quick checks before you buy:

• Verify engine platform and accessory combination against the kit's application list
• Match belt rib count and length to your pulleys
• Choose a finish that fits your build and budget

Measuring accurately matters, so review how to measure a serpentine belt. Add accessory mounting brackets if your kit needs them. Read up on whether lightweight pulleys add horsepower before you commit.