SKU: 42506257672

Holley Mid-Mount Race Accessory System- Black Finish - 20-187BK

Sale price$989.97 Regular price$1099.97
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

Holley Mid-Mount Race Accessory System- Black Finish - 20-187BKOverview: Holley's Mid Mount Accessory Drive System is now offered for the serious racer in mind. If you need a front drive system for your LS engine racecar, they are now available without air conditioning and power steering depending upon your needs! Holley's Premium Mid Mount complete 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

Overview:

Holley's Mid-Mount Accessory Drive System is now offered for the serious racer in mind. If you need a front drive system for your LS engine racecar, they are now available without air conditioning and power steering depending upon your needs! Holley's Premium Mid-Mount complete 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 water pump for a clean, integrated form. The design offers superb engine visibility to show off your horsepower, not your accessories. Among the many swap friendly features are bottom heater outlets for clearance in tight applications. The Holley designed alternator is just as innovative. This premium alternator utilizes 6-phase technology as found on the C7 Corvette. The water pump also shares its design efficiencies with that of the C7 Corvette. The Mid-Mount drive completes Holley's trilogy of accessory solutions giving a third option compared to the High and Low-Mount previously released. All three accessory solutions are for LS engines. When we say "complete", we mean complete. The Mid-Mount system comes with everything you need. All accessories are included; the water pump, alternator, and the crank damper. All pulleys and the belt are supplied. Even heater hose adapters, 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. This system is ready for the racetrack if you want to play or just be ready for anything on the street.

Features:

  • Bracketless accessory mounting with ultra-easy assembly
  • Bottom outlet heater hose options for swap application clearance
  • LT1 style premium 150 amp alternator
  • LT1 style water pump cartridge design
  • Steam tube input port
  • Shortened top outlet nipple for more radiator hose turns and routing room
  • OE pulley ratios for optimal accessory performance
  • No adapters/spacers required!
  • Works with all common aftermarket and factory Throttle bodies and intakes.
  • Works with VVT applications
  • Works with Hooker turbo manifolds.
  • Fits ALL LS engines except with dry sump and/or supercharger.

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

A/C Compressor Included No
A/C Compressor Type N/A
Accessory Drive Style Mid Mount
Alternator Amperage 150
Alternator Included Yes
Application GM LS
Belt Included Yes
Brand Holley
Choose Your Part Accessory Drive Kits
Damper Included Yes
Damper Style Cast Damper
Emission Code 5
Engine GM LS
Finish Black
Inlet Size 35.4mm/1.4"
Material Cast Aluminum
Output 150 Amps
Power Steering Hardline Included No
Power Steering Pulley Included No
Power Steering Pump Included No
Power Steering Reservoir Included No
Product Type Accessory Drive Kits
Pulley Style Serpentine
Tensioner Included Yes
Thermostat Included Yes
Warranty Limited 90 Day
Water Neck Included Yes
Water Pump Included Yes
Water Pump Pulley Included Yes
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 42506257672

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4.1 ★★★★★
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T
The Patriot Tzu
Natrona Heights, US
★★★★★ 5
Nice blanket
Color: Southern Blues, Size: Full/Queen (90 in x 90 in), Color: Southern Blues, Size: Full/Queen (90 in x 90 in)
This is a really nice blanket. If fits on my bed very well. It went through the laundry really nice and didn’t fade or ripper. Have any strings come undone. I like the very light green color. My pictures aren’t great, but one side is the underneath side, the white and then the light green is the other picture. This is well-made you can see in the picture up close that it’s so really well. All layers are sewn together, so you do not have bunching up when you wash the blanket. It is super soft with a good weight. It’s not super lightweight, but it’s not heavy at all. Overall, I’m very pleased with it and I would recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
T
Tanya Scoggin
Omaha, US
★★★★★ 5
Soft, Lightweight, and Perfect for Year-Round Comfort
Color: Polar Blue, Size: King (90 in x 108 in)
This Berkshire 3-layer fleece blanket is exactly what I was hoping for. It is incredibly soft and has a cozy cotton-like feel without being too heavy or bulky. The king size is generous and fits the bed nicely, but it is also comfortable enough to use on the couch. I really like that it feels warm and breathable at the same time, so it works well for different seasons. The Polar Blue color is soft and pretty, and the blanket has a nice textured look that makes it feel a little more elevated than a basic fleece blanket. It also washes well, which is a huge plus. After washing, it still feels soft and comfortable, and it did not lose its shape. Overall, this is a great blanket if you want something cozy, lightweight, and easy to care for. I would definitely recommend it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
A
Amazon Review
Boise, US
★★★★★ 5
I love this because it folds up easily & does not take up much space but keeps you warm and secure.
Color: Southern Blues, Size: King (90 in x 108 in)
Heavy and BIG. The color is great. Its not very thick but it does have some heft to it. I love this because it folds up easily and does not take up much space but keeps you warm and secure. Its got a waffle type contour texture. It says its fleece but to me it did not feel like fleece. However, I have never heard of berkshire fleece before-- I would not guess this is fleece at all. Its not fuzzy in the least. It is breathable and the color is muted and perfect. For a king sized blanket this is surprisingly portable yet substantial enough to keep the entire bed covered and warm!
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Reviewed in the United States on May 21, 2026
C
Cheryl Belle
Waukegan, US
★★★★★ 3
Thin, summer weight throw, quality could be better
Color: Southern Blues, Size: Throw (50 in x 60 in), Color: Southern Blues, Size: Throw (50 in x 60 in)
This is a very light weight blanket and the "fleece" is no where to be seen. The blanket looks like cotton but has a very synthetic feel to it. Three layers implies some weight but it is thin. The construction is sloppy, see images, where the stitching looks slap dash to the point where it cannot be reversed. I liked the color, the blue is a little on the aqua side but it is a very nice calming hue. The stitching is quilt like and nicely done. I noticed other reviews felt like it was a medium weight but the only time I would use this would be to use as a cover if the AC went out. To me, the blanket is decorative and not particularly useful.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
H
Hayden
Louisville, US
★★★★★ 4
Average quality lightweight throw, not sold on the color
Color: Southern Blues, Size: Throw (50 in x 60 in), Color: Southern Blues, Size: Throw (50 in x 60 in)
This blanket is fairly soft and lightweight, and better suited for the summer months. I don't think the texture and "Southern Blues" color looks as nice in person as in the photos; less cozy and more like a spare blanket you might find in a hotel closet. Interestingly the care tag says that the outer faces are cotton, but the blanket feels polyester and the content tag indicates the same. The stitching and durability feel ok, and it will probably hold up for the occasional machine washing and low heat drying. Overall it's a fine warm season throw but not particularly notable. I would probably recommend one of the darker colors.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026

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