Holley 20-134 | Accessory Drive Component Mount Set

Part Number
Accessory Drive Bracket
In stock
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Estimated Ship Date: 1 Business Day or Less
Holley is pleased to offer simple, clean, cost effective solutions that solve the accessory drive challenges encountered when swapping a GM LS engine into a muscle car, truck, hot rod or other vehicle. These brackets were designed to deliver a factory style appearance, correct belt alignment and factory stability.

BRAND: Holley


  • Clean Looks And Durability
  • Accessory Drive Bracket
  • Cast Aluminum
  • Dress Up Accessory Brackets
  • Bolt On Solution
  • Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles| Uncontrolled (Non-Emissions Controlled) Vehicles| and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
  • OEM Quality Natural Finish Die Casing
  • Simple Dedicated Installation Kits Allow Easy Fitment
  • NOTE: This bracket REQUIRES an install kit for assembly (Part 21–1| 21–2| OR 21–3| see Fitment Guide below for the correct install kit for your application).Key Features:• Universal bracket| fits virtually all common LS engines regardless of water pump and harmonic balancer offsets reducing cost and complexity compared to competitive products• Simple| dedicated install kits allow easy fitment to Corvette| F-Body or Truck drive offsets• Utilizes commonly available and affordable GM A/C compressors• Positions the compressor high above the cross-member but below the hood line for easy installation and great looks• Bolt-on solution to relocate A/C compressor on engines using a GM Corvette accessory drive system• Accepts GM R4 compressor (Sanden version now available)• OEM quality natural finish die casting for clean looks and durability. Can be polished| coated| painted or plated.• OEM spec flanged head hardware included to match your factory LS engine hardware• Complete accessory drive kits include all components and accessories are also available • Ideal for crate engines| take out motors and engine builders!Holley s kits supply the required brackets and hardware needed for install| but allow you to choose the source for supplemental accessories and components that are often already on the donor engine or host vehicle. A Fitment And Required Components Guide helps you locate and source components and provides other notes and helpful hints. 3 easy steps will get you going. Step 1 is to determine your belt alignment based on your crank pulley position on the engine you have. Step 2 is to choose the Holley accessory drive brackets that you need (A/C| Alt/P/S or both). Step 3 is to see which Holley installation kit your set-up requires to line up your accessories with your crank pulley position. An application specific installation kit (part # 21-1| 21-2| or 21-3) is REQUIRED for most applications.
  • Accessory Drive Bracket| Cast Finish| GM LS| A/C Accessory Drive Bracket Kit| Passengers Side Bracket Only| Works w/R4 Compressor|
  • Accepts GM R4 Compressor
  • Most Cost Effective LS Bracket Solution On The Market


Accessory Drive StyleHigh Mount
Engine Make/SizeGM LS
MaterialCast Aluminum
WARNING CA Proposition 65No

Customer Questions
Can a serpentine belt cause smoke?
Yes, a serpentine belt can cause smoke. A serpentine belt is an essential component of a vehicle's engine system. It drives various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. If the serpentine belt becomes worn, damaged, or misaligned, it can cause friction and generate smoke.
Why is my serpentine belt squealing?
The serpentine belt can squeal due to various reasons, including tension issues, worn-out belt, or a problem with the belt's pulleys.
Is my serpentine belt too tight?
If your serpentine belt is causing issues like excessive noise or accelerated wear on the pulleys, it may indicate that the belt is too tight.
Why did my serpentine belt come off?
Serpentine belts can come off due to factors such as belt wear, improper tension, misaligned pulleys, or a faulty tensioner.
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