Belts & Accessory Drive

Accessory Drive Belts & Brackets — LS Swap and Performance Solutions

The accessory drive system — the belt, tensioner, and bracket arrangement that drives the alternator, power steering pump, and air conditioning compressor from the crankshaft — is one of those areas that can make or break the presentation and functionality of an engine swap. On a factory installation, everything fits because it was designed to. Drop an LS engine into a classic truck or hot rod and suddenly you're dealing with the integration challenge of mounting modern accessories in a space designed around a very different engine architecture.

With 101 products focused predominantly on Holley's comprehensive LS accessory drive range, Billy's Speed Shop has the brackets, belt kits, and tensioner components to build a clean, functional accessory drive on your LS swap or engine build.

LS Accessory Drive Systems — High and Low Mount Configurations

The Holley accessory drive range addresses the challenge of LS engine installation with two primary configurations: high-mount systems that position the alternator at the top of the engine in a position similar to traditional Small Block Chevy layouts, and mid-mount systems that keep the accessories tighter to the engine for improved fitment in tight engine bays. Both systems are available with and without air conditioning provisions, with and without power steering, allowing you to configure exactly the accessory setup your build requires.

These systems are more than just brackets — they're engineered accessory drive solutions that include all mounting hardware, correctly sized belt specifications, and tensioner arrangements that maintain proper belt tension without the improvisation that characterised early LS swap accessory drive solutions. The result is an engine that looks like it belongs in the vehicle, with reliable accessory function and a professional appearance.

Tensioner Pulleys and Belt Components

Tensioner pulleys and idler pulleys are wear items that should be replaced as part of any complete belt service or when building a new accessory drive system. Correct tensioner function maintains belt tension throughout the operating temperature range and belt stretch that occurs with use — a seized or worn tensioner causes belt slip, accessory failure, and in worst cases belt-off events that can result in engine overheating within minutes.