SKU: 84667091630

Holley Premium Mid-Mount Complete Accessory System - 20-180

Sale price$1507.47 Regular price$1674.97
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Ships within 48 hours · Estimated delivery Aug 16 - Aug 21

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Description

Holley Premium Mid-Mount Complete Accessory System - 20-180Overview: 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

Overview:

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 compact and reliable SD7 A/C compressor and Type II P/S pump with baffled reservoir are also integrated. 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, A/C compressor, Alternator, P/S pump with reservoir, and an SFI certified damper w/hard anodized billet crank pulley. 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. The Premium Mid-Mount system comes with dress up pulley covers and an SFI certified damper. Partnered with this damper is a billet 6061-T6 aluminum hard anodized crank pulley. 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
  • Compact SD7 A/C compressor
  • Type II power steering pump with baffled reservoir
  • P/S adapter hardline to AN -6 adapter included
  • 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!
  • Billet tensioner cover
  • Billet alternator, and compressor pulley covers
  • SFI certified damper w/hard anodized billet crank pulley
  • 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 Yes
A/C Compressor Type SD7
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 SFI Certified
Emission Code 5
Engine GM LS
Finish Cast
Inlet Size 35.4mm/1.4"
Material Cast Aluminum
Output 150 Amps
Power Steering Hardline Included Yes
Power Steering Pulley Included Yes
Power Steering Pump Included Yes
Power Steering Reservoir Included Yes
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: 84667091630

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4.7 ★★★★★
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H
Helen M
Charlottesville, US
★★★★★ 5
Looks & Feels Good!
Size: X-Large, Color: Wine Red
I got this shirt for my husband in wine red and he likes it a lot! He can be very picky, but he hasn't had any complaints about this shirt. The wine red color looks just like it does in the picture and it fits true to size. It can be worn on its own or layered under a shirt or sweater when the weather gets cold. Hubby has machined washed and tumble dried this shirt multiple times and it still looks and feels great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 15, 2025
K
Katerina Petrova
Natrona Heights, US
★★★★★ 4
Long sleeve tee
Size: XX-Large, Color: Wine Red, Size: XX-Large, Color: Wine Red
Ordered this one size up simply due to preference. It runs true to size otherwise. The material is stretchy and the color was accurate. The ribbing sets this apart from other plain long sleeve tees. The only thing I don’t like is the curved hem. Makes it look very girly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 6, 2025
D
David
New York, US
★★★★★ 5
Excellent fit and a good look
Size: Small, Color: Grey, Size: Small, Color: Grey
I'm very pleased with the way this shirt looks on me. Despite being a "squeeze" material, it's quite comfortable to wear. The fit, at least for me, is spot-on. Design-wise, I found that the lines on the front of the shoulders look a little odd, almost like they're supposed to the shoulder seams. But overall, I really like this shirt, and $20 for a shirt that fits this well is a steal.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 9, 2025
M
MTL
Pawtucket, US
★★★★★ 3
Bizarre bottom hem shape
Size: Medium, Color: Wine Red, Size: Medium, Color: Wine Red
First, my stats: I’m 6 foot 1, 185 pounds. I ordered a medium size. At first glance, I liked this shirt, but after observing what the bottom looks like, I’m not even sure I want to keep this. A picture is worth many words, so take a look at the ones I included in this review. The bottom hem in the front curves down in a strange sort of “tunic” style. This renders the garment completely unwearable in my opinion, as this is not a shirt that I think would look good tucked into pants. If the bottom of the shirt was flat/straight, it would be four or five stars. As such, I’m rating this three stars because the only thing wrong with this shirt is the bottom, and this might not bother everyone else.
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Reviewed in the United States on October 4, 2025
M
MichkaNik
Omaha, US
★★★★★ 5
Husband won't stop wearing this shirt!
Size: Large, Color: Black, Size: Large, Color: Black
My husband LOVES this shirt. The moment I wash it, he immediately wears it again. It is super soft and comfortable!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 18, 2025

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