SKU: 20909300139

Holley Premium Polished Mid-Mount LS7 Complete Accessory System-Dry Sump 20-190P

Sale price$1912.47 Regular price$2124.97
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Description

Holley Premium Polished Mid-Mount LS7 Complete Accessory System-Dry Sump 20-190PLS7 Engine Drive includes SD7 A C Compressor, Alternator, P S Pump, Tensioner, SFI certified damper w hard anodized billet crank pulley, Belt, & Pulleys Fits Dry Sump Engines. 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, where the accessories bolt directly to the water pump for a clean, integrated form. The design offers

LS7 Engine Drive includes SD7 A/C Compressor, Alternator, P/S Pump, Tensioner, SFI certified damper w/hard anodized billet crank pulley, Belt, & Pulleys - Fits Dry Sump Engines.

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, 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.

NOTES: "The power steering pump included can be used Hydroboost systems. Please refer to the flow specs on part number 198-101 This accessory drive is for LS7 & LS3 Dry Sump engine applications

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 Hooker turbo manifolds.
  • Fits LS7 and LS engines with dry sump and without supercharger.
  • Polished Finish

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
Clearance Category Engine
Damper Included Yes
Damper Style SFI Certified
Discount Percentage 26-50%
Emission Code 5
Engine GM LS7
Finish Polished
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
Sale Category Engine
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: 20909300139

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4.4 ★★★★★
Based on 23 reviews
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Product Reviews
J
Verified Purchase
Johnson Phan
Charlottesville, US
★★★★★ 5
Easy to use and affordable - great value for money!
Color: Black
I recently purchased the Nessus WDT Espresso distribution tool and I am thoroughly impressed with its performance. Assembling it was a breeze, and it came with extra needles which is always a plus. The tool is easy to clean, which is important to me because I like to keep my equipment in top condition. The price was very fair compared to other similar products on the market, making it an even better value for money. One thing that really stood out to me was the brush that collects the coffee grounds. It's incredibly easy to clean, which makes maintenance a breeze. I've had my share of espresso machines in the past, and I can tell you that this one is a keeper. I would definitely recommend it to anyone looking for a high-quality distribution tool at an affordable price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 16, 2025
A
Verified Purchase
aryn duncan
Battle Creek, US
★★★★★ 5
This WDT is perfect!
Color: Black
I love this WDT! I had to look at the photos of the product to figure out how to "install" the needles. It took just a little patience to align the needles with the holes. I think the design is flawless. You can choose how many needles to use and the needle length is perfect. The needles are shorter than my previous WDT, and I have more control with the shorter needles. It's easy to slip the tool into its holder and the brush keeps the needles clean. I'm very particular, and I think this tool is perfect! I went to the Nessus page to see what other espresso tools they have because I like this tool so much, and the price is great! Unfortunately, I didn't see other tools.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026
T
Verified Purchase
TCM
San Leandro, US
★★★★★ 5
Love the interior brush too
Color: Black
This works perfectly as described, and I like that they offer additional needles if one ever breaks or bends. The internal brush is really nice to clean off residue grounds. Extremely easy to clean as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
K
Verified Purchase
Krystal
Battle Creek, US
★★★★★ 4
Good starter WDT
Color: Black, Color: Black
I very much think this is a good starter distribution tool! The needles are a bit flimsy so sometimes when you are distributing the coffee grounds, it tends to flick the coffee grounds around out of my Porter filters. That’s the only reason I deducted one star, but other than that I enjoy the fact that it has that sponge on the inside, so it cleans off the tool after each use, which is a nice feature. It’s pretty lightweight and good in size and easy to use. For the price and starting off my espresso at home journey I think this is good to start with. The photo I posted is of the inner bristles pushed up so you see what’s on the inside and what is actually cleaning off the tool every time you insert it back into the case and this is after I’ve used it for over a month ☺️
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 24, 2025
M
Verified Purchase
Memphis Tigers 🐯
Los Angeles, US
★★★★★ 5
Amazing WDT Tool!
Color: Black
This WDT tool instantly improved the evenness of my puck prep, and the difference in my shots was obvious. The ultra‑fine needles fluff the grounds perfectly without creating channels. It has a nice weight to it and feels like a real upgrade compared to cheaper plastic options.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026

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