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$237 Off
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#42520291
Holley 20-291 Mid-Mount Accessory System, Gen III HEMI, Natural
- Bracketless Accessory Mounting System for Ultra-Easy Assembly - Timing Cover is Integrated into this Bracket / Casting
- Configurable Heater Hose Connection Options - for Hose Routing Flexibility
- Holley Premium 150 Amp alternator - Plenty of Power for All Vehicle Systems
$3,049.95
/kit
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$3,286.95
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Product Summary
Universal Fit, Crankshaft Pulley Included
- Bracketless Accessory Mounting System for Ultra-Easy Assembly - Timing Cover is Integrated into this Bracket / Casting
- Configurable Heater Hose Connection Options - for Hose Routing Flexibility
- Holley Premium 150 Amp alternator - Plenty of Power for All Vehicle Systems
- Easy Wiring of Alternator That Doesn't Require Factory ECU to Excite Alternator
- Alternator is Tucked in Tight to the Engine - Eliminates Frame Rail or Hood Clearance Issues (Common with Factory Car or Truck Drive Systems)
Key Specs
| Pulley Style | Serpentine |
| Crankshaft Pulley Included | Yes |
| Crankshaft Pulley Material | Steel |
| Crankshaft Pulley Finish | Natural |
| Crankshaft Pulley Grooves | 6-groove, serpentine |
Need To Know
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Holley 20-291 Details
Holley's complete, mid-mount accessory system has all accessories pulled in tighter than other accessory drives. At the heart of the system is a "bracketless" design (patent pending), where the accessories bolt directly to the timing cover for a clean, integrated system. The design offers superb engine visibility to show off your horsepower, not your accessories. Among the many swap friendly features are two optional heater connection configurations. The innovative Holley premium alternator incorporates 6-phase and square wire technology. The compact and reliable SD7 A/C compressor and Type II P/S pump with baffled reservoir are also integrated. The kit utilizes Holley's proven cartridge style water pump. When we say "complete", we mean complete. The Mid-Mount system comes with everything you need. All accessories are included; the water pump, A/C compressor, Alternator, P/S pump with reservoir, and the crank damper. All pulleys and the belt are supplied. Even heater hose adapters, power steering to -6 AN hardline, and the alternator plug/harness are included. Easy assembly was a priority during the entire development of this accessory solution. Color graphical instructions walk you through every step of the ultra-easy installation.
Features:
- Bracketless Accessory Mounting System for Ultra-Easy Assembly – Timing Cover is Integrated into this Bracket / Casting
- Configurable Heater Hose Connection Options - for Hose Routing Flexibility
- Holley Premium 150 Amp alternator – Plenty of Power for All Vehicle Systems
- Easy Wiring of Alternator That Doesn't Require Factory ECU to Excite Alternator
- Alternator is Tucked in Tight to the Engine – Eliminates Frame Rail or Hood Clearance Issues (Common with Factory Car or Truck Drive Systems)
- Holley Water Pump w/ Cartridge Design – Compact And Easy to Service Without Removing the Water Pump Housing / Timing Cover
- SD7 A/C Compressor – Small Compact Compressor
- Type II Power Steering Pump with Baffled Reservoir
- Power Steering Pump Has Proper Pressure for use with Steering Box on Older Vehicles (Eliminates Steering Box Damage Due to Excessive Pressure)
- Swivel Water Inlet And Outlet – Allows Custom Radiator Hose Routing
- OE (Original Equipment) Pulley Ratios for Optimal Accessory Performance
- No Adapters or Spacers Needed – for Easy Installation
- Works with Common After-Market and Factory Throttle Bodies and Intakes
- Choose from Kits in Natural Aluminum or Black Finish – Fits Naturally Aspirated Gen III Hemi Engines (5.7L, 6.1L, and 6.4L)
- Includes OE Style Damper with Cast in Serpentine Pulley
- All Accessories are Included; Water Pump, A/C Compressor, Alternator, Power Steering Pump w/ Reservoir, Pulleys And Crank Damper
- All Plumbing Adapters, Wiring Adapters, Gaskets and Seals are Included
- Available for VVT (Variable Valve Timing – 2009-Up 5.7L and 2011-Up 6.4L) and Non-VVT (2003-2008 5.7L, and 2005-2010 6.1L) Engines in Natural Cast Aluminum or Black Finish
This accessory drive system fits following VVT Engines:
2009 - Up 5.7L
2011 - UP 6.4L
Guides & Documents
Holley 20-291 Specifications
Holley 20-291 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 20-291 |
| Brand | Holley |
| Pulley Style | Serpentine |
| Crankshaft Pulley Included | Yes |
| Crankshaft Pulley Material | Steel |
| Crankshaft Pulley Finish | Natural |
| Crankshaft Pulley Grooves | 6-groove, serpentine |
| Water Pump Material | Cast Aluminum |
| Water Pump Finish | Natural |
| Water Pump Pulley Included | Yes |
| Water Pump Pulley Material | Steel |
| Water Pump Pulley Grooves | Non-ribbed |
| Power Steering Pump Finish | Natural |
| Power Steering Pump Reservoir Finish | Black Powder Coated |
| Power Steering Pump Reservoir Included | Yes |
| Power Steering Pump Reservoir Material | Plastic |
| Power Steering Pump Reservoir Style | Integral |
| Power Steering Pump Style | Type 2 |
| Power Steering Pulley Attachment | Press Fit |
| Power Steering Pulley Finish | Black Powder Coated |
| Power Steering Pulley Grooves | 6-groove, serpentine |
| Power Steering Pulley Included | Yes |
| Power Steering Pulley Material | Steel |
| Alternator Material | Cast Aluminum |
| Alternator Finish | Natural |
| Alternator Amperage | 150 amp |
| Alternator Pulley Grooves | 6-groove, Serpentine |
| Alternator Pulley Included | Yes |
| Alternator Pulley Material | Steel |
| Alternator Brackets Included | No |
| A/C Compressor Finish | Natural |
| A/C Compressor Type | Sanden SD-7 |
| A/C Pulley Grooves | 6-groove, Serpentine |
| A/C Pulley Included | Yes |
| A/C Pulley Material | Steel |
| A/C Bracket Included | No |
| Idler Brackets Included | No |
| Idler Included | No |
| Tensioner Included | Yes |
| Tensioner Style | Spring-loaded |
| Tensioner Cover Included | No |
| Hardware Included | Yes |
| GENERAL | |
| Water Pump Pulley Finish | Black powdercoated |
| Sold in Quantity | Kit |
| GTIN Code | 090127109175 |
Ratings & Reviews
Ratings & Reviews
Fitment
Fitment
2005-2010 Chrysler 300
5.7 Chrysler Hemi V8
6.1 Chrysler Hemi V8
2011 Chrysler 300
5.7 Chrysler Hemi V8
2012-2014 Chrysler 300
5.7 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2015-2022 Chrysler 300
5.7 Chrysler Hemi V8
2007-2009 Chrysler Aspen
5.7 Chrysler Hemi V8
2008 Dodge Challenger
6.1 Chrysler Hemi V8
2009-2010 Dodge Challenger
5.7 Chrysler Hemi V8
6.1 Chrysler Hemi V8
2011-2014 Dodge Challenger
5.7 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2015-2019 Dodge Challenger
5.7 Chrysler Hemi V8
6.2 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2021-2022 Dodge Challenger
5.7 Chrysler Hemi V8
6.2 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2006-2010 Dodge Charger
5.7 Chrysler Hemi V8
6.1 Chrysler Hemi V8
2011 Dodge Charger
5.7 Chrysler Hemi V8
2012-2014 Dodge Charger
5.7 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2015-2019 Dodge Charger
5.7 Chrysler Hemi V8
6.2 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2021-2022 Dodge Charger
5.7 Chrysler Hemi V8
6.2 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2004-2009 Dodge Durango
5.7 Chrysler Hemi V8
2011-2023 Dodge Durango
5.7 Chrysler Hemi V8
2005 Dodge Magnum
5.7 Chrysler Hemi V8
2006-2008 Dodge Magnum
5.7 Chrysler Hemi V8
6.1 Chrysler Hemi V8
2002-2010 Dodge Ram 1500
5.7 Chrysler Hemi V8
1994-2010 Dodge Ram 2500
5.7 Chrysler Hemi V8
1999-2000 Dodge Ram 2500 Van
5.7 Chrysler Hemi V8
2002-2003 Dodge Ram 2500 Van
5.7 Chrysler Hemi V8
1994-2010 Dodge Ram 3500
5.7 Chrysler Hemi V8
1999-2003 Dodge Ram 3500 Van
5.7 Chrysler Hemi V8
2006-2010 Jeep Commander
5.7 Chrysler Hemi V8
2005 Jeep Grand Cherokee
5.7 Chrysler Hemi V8
2006-2010 Jeep Grand Cherokee
5.7 Chrysler Hemi V8
6.1 Chrysler Hemi V8
2011 Jeep Grand Cherokee
5.7 Chrysler Hemi V8
2012-2014 Jeep Grand Cherokee
5.7 Chrysler Hemi V8
6.4 Chrysler Hemi V8
2015-2023 Jeep Grand Cherokee
5.7 Chrysler Hemi V8
2022-2023 Jeep Grand Wagoneer
6.4 Chrysler Hemi V8
2022 Jeep Wagoneer
6.4 Chrysler Hemi V8
2018 Jeep Wrangler JL
6.4 Chrysler Hemi V8
2013-2014 Ram Ram Pickup
5.7 Chrysler Hemi V8
1952 Studebaker 2R14
5.7 Chrysler Hemi V8
1950 Studebaker 2R15
5.7 Chrysler Hemi V8
1953 Studebaker 2R15
5.7 Chrysler Hemi V8
1939 Studebaker Champion
5.7 Chrysler Hemi V8

