Holley Mid-Mount Race Accessory System - 20-187
SKU: 896462550

Holley Mid-Mount Race Accessory System - 20-187

Sale price$967.47 Regular price$1074.97
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Description

Holley Mid-Mount Race Accessory System - 20-187Overview: 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 Cast
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: 896462550

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Jess
Bozeman, US
★★★★★ 5
so cute
Color: Pink, Size: 7-8 Years
so cute for my daughters field day - I thought it came with built in shorts but I also didn't read the description. doesn't matter either way, it did the job and she looked cute doing it!
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Reviewed in the United States on June 16, 2025
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leelee33
Grantham, US
★★★★★ 3
Wish it came with shorts
Color: White, Size: 9-10 Years, Color: White, Size: 9-10 Years
Ordered a size 9/10 for 55 inch tall kid and felt it was a size too big. The top is lined but the skirt isn't and it did not come with shorts underneath. I purchased some separately and it looks pretty good.
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Reviewed in the United States on April 13, 2025
A
Verified Purchase
Alicia
Belleville, US
★★★★★ 5
Super soft!
Color: Black, Size: 9-10 Years
Cute and comfortable fit my daughter great!
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Reviewed in the United States on March 23, 2026
N
Niki Noble
Bozeman, US
★★★★★ 5
Stylish, Comfortable, and Perfect for Active Days
Color: White, Size: 13-14 Years
This dress exceeded my expectations in both style and performance. The design is really cute and sporty, making it perfect not just for tennis or golf, but also for school, pickleball, or just an active day out. It has a clean, modern look that feels age-appropriate for teens while still being functional. The built-in shorts are a huge plus. They provide great coverage and stay in place during movement, so there’s no constant adjusting. The fabric is lightweight and breathable, which makes a big difference during warm weather or long practice sessions. It also has a nice stretch, allowing for a full range of motion without feeling tight or restrictive. Another thing I appreciate is how well it holds up after washing. The color stays vibrant, and the material doesn’t lose its shape or softness. It still looks new even after multiple wears. Overall, this is a great combination of comfort, practicality, and style. Whether it’s for sports or everyday wear, it’s a versatile outfit that delivers on quality and looks great too.
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Reviewed in the United States on March 31, 2026
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Josh/Katie
San Leandro, US
★★★★★ 4
Comfortable athletic dress with detached shorts
Color: Black, Size: 11-12 Years
I really like that the shorts are not attached. It makes bathroom breaks and outfit changes much easier with less hassle. The dress itself is thin and lightweight, which works well for warmer weather. The material feels good quality and breathable, and it stretches enough for movement during sports. This dress is definitely cute enough for casual wear as well. The size chart is accurate and the fit was just right. The separate shorts provide good coverage and are functional for activities like tennis or school sports. Overall, this dress works well for active wear, holds up nicely, and is worth the money for the comfort and design.
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Reviewed in the United States on February 26, 2026

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