Holley 20-131 R4 Compressor LS Accessory Drive AC, PS, Alt Bracket Kit
Chevy LS V8
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
HolleyDAYS are here again! SAVE up to 20% on this part and hundreds of other Holley brands during the 2018 HolleyDAYS sale 11/15/18-12/31/18.
These accessory drive brackets from Holley are great 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. Holleys kits supply the required brackets and hardware needed for installation.
To determine correct application, these three easy steps will help get you going:
- Step one is to determine your belt alignment based on your crank Pulley position on the engine you have.
- Step two is to choose the Holley accessory drive brackets that you need (A/C, Alt & P/S or both).
- Step three 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 # 425-211, 425-212, or 425-213) is REQUIRED for most applications.
Note: When referring to guide links below, keep in mind that part numbers shown are MFG numbers without "425" prefix.
This bracket kit REQUIRES an additional installation kit for assembly
(Part 425-211, 425-212, OR 425-213, see Fitment Guide for the
correct installation kit for your application).
Holley's kits supply the required brackets and hardware needed for installation, but allow you to choose the source for supplemental accessories and components that are often already on the donor engine or host vehicle. Whether sourcing from the salvage yard, the local auto parts store, your GM parts dealer, or Holley, you pick the accessories that match your needs and budget!
Works with R4 A/C compressor; Requires application specific installation kit
- The most cost effective LS bracket solution on the market!
- Universal brackets fit virtually all common LS engines regardless of water pump and harmonic balancer offsets reducing cost and complexity compared to competitive products
- Simple, dedicated installation kits allow easy fitment to Corvette, F–Body or Truck drive offsets
- Utilizes commonly available and affordable GM alternators, power steering pumps and A/C compressors
- A/C brackets position the compressor high above the cross–member but below the hood line for easy installation and great looks
- A/C brackets are also a bolt on solution to relocate A/C compressor on engines using a GM Corvette accessory drive system
- A/C bracket accepts GM R4 compressor
- OEM quality natural finish die castings 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
- Ideal for crate engines, take out motors and engine builders!
More Like This
Holley 20-135 Drivers Side P/S & Alternator LS Acc Drive Bracket Kit
Holley 21-1 LS Acc. Drive Bracket Installation Kit, Standard Alignment
Holley 20-132 LS Accessory Drive Bracket-ALT, P/S, A/C
Holley 21-2 LS Accessory Drive Bracket Installation Kit, Middle Align
Holley 21-3 LS Acc Drive Bracket Install. Kit, Long, Long Style Pump
Holley 20-132BK LS Accessory Drive Braket Kit, Black
Bills Hot Rod Co 1100 Series LS Swap A/C Compressor Bracket
Bills Hot Rod Co 1100 Series Serpentine Front Drive Kit, LS Engine
Bills Hot Rod Co 1100 Series LS Swap Alternator Brackets
Holley 97-170 Replacement Hardware Kit for 20-131 & 20-136
Q & A
In this episode, Project Chevelle takes a big step in its muscle car transformation. It's out with the little old 307 and to the dyno with our new 383 from BluePrint Engines!
In preparation to transplant a 430hp 383 stroker into Project Chevelle, Zach R. made up a set of plug wires for the car. To keep it nice and tidy they needed to be routed just right, be the perfect length and not distract from the engine!