SKU: 16735308147

Holley Big Block Chevy Mid-Mount Complete Accessory System - 20-242BK

Sale price$989.97 Regular price$1099.97
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Ships within 48 hours · Estimated delivery Sep 1 - Sep 6

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Description

Holley Big Block Chevy Mid-Mount Complete Accessory System - 20-242BKOverview: Holley's Mid Mount accessory drives are now available for your big block Chevrolet engines! The revolutionary system does what no other accessory bracket system has done GETS RID OF THE BRACKETS! The 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,

Overview:

Holley's Mid-Mount accessory drives are now available for your big block Chevrolet engines! The revolutionary system does what no other accessory bracket system has done… GETS RID OF THE BRACKETS! The 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. 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 water pump design incorporates optional side or top heater ports. The top thermostat bypass and heater ports are recessed into the manifold. So if you don't need them, you don't see them! 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, and P/S pump with reservoir. All pulleys and the belt are supplied. Even A/C line adapter, 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:

  • The Mid-Mount complete accessory system has all accessories pulled in tighter than other accessory drives.
  • Bracketless accessory mounting with ultra-easy assembly
  • O-ring seal to engine
  • Hidden thermostat bypass and heater hose ports with NPT line adapters included
  • LT1 style premium alternator
  • LT1 style water pump design
  • Compact SD7 A/C compressor with line adapter included
  • Type II power steering pump with baffled reservoir
  • P/S adapter hardline to AN -6 adapter included
  • OE pulley ratios for optimal accessory performance
  • Available in natural and black finishes
  • Billet alternator, tensioner, and compressor pulley covers

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 Chevrolet Big Block
Belt Included Yes
Brand Holley
Choose Your Part Accessory Drive Kits
Damper Included No
Damper Style Factory
Emission Code 3
Engine Chevy Big Block V8
Finish Black
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 No
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: 16735308147

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Collector 4 Life
Chelsea, US
★★★★★ 5
Fit me even better than I was hoping.
Size: XX-Large, Color: Beau Blue
I was all but convinced upon receipt I would be sending these back but they fit beautifully. The trick is understanding what the directions are trying to tell you. I’m 6’4 with a 40 inch waist on traditional jeans (regular fit). I selected 2XL because my feeling was I would want and need a waist line that would fit me but not constrict me. Admittedly my regular fits were getting close to not fitting as good anymore so I felt 2XL would give me that “extra” my regular fits were no longer affording me. Comfortable at the waist(not too tight) and they fit me nicely all over. Perfect length. Colors look great too. The pictures shown are accurate. I’ll be ordering more. Give these a try! Definitely worth the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
A
Verified Purchase
Alfonso
West Palm Beach, US
★★★★★ 5
amazing pair of jeans!
Size: XX-Large, Color: Dirty Blue
im 6'2, 280 currently , bought a 38/32 pair of, these jeans and will instantly look forward to buying more, just for comparison , the same day i got these i tried on a pair of levis i had just bought as well, the Levi jeans i got were also 38/32, and they were the 501's which are stretchy, but maaaan, let me tell you, the difference between those and these are night and day, these feel like i can run a mile in them and do whatever activities i choose to, its stretchy in all the right places, the crotch area isnt tight at all, these are incredibly breathable and in comparison to the levi's price , these are cheaper by $15 and they weren't even on sale, unlike the levis which were on sale by 15% and STILL costed $50. Will buy more ASAP. 10/10
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2025
M
Verified Purchase
Ma
Draper, US
★★★★★ 5
stretch jeans
Size: Large, Color: Dirty Blue
These jeans because they are very comfortable. They stretch just the right amount without binding. I am female but wear men's jeans. These jeans ride lower so sometimes slide down. I ended up solving that issue by ordering a second pair in a smaller size. Worked perfectly. They stretch so no problem there, and now they stay up!
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Reviewed in the United States on March 18, 2026
D
Verified Purchase
Danny B.
Phoenix, US
★★★★★ 4
well made product
Size: Medium, Color: Beau Blue
i love these jeans they fit well, a little longer the described
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Reviewed in the United States on September 28, 2025
A
Verified Purchase
alienres
Carnegie, US
★★★★★ 5
very comfortable, good looking
Size: X-Large, Color: Deep Blue
Perfect for my husband. So comfortable and look like regular jeans like he used to be able to wear. All his life he would only wear Levi shrink to fit, but in last few years they were too stiff and uncomfortable due to injuries and poor health, so has been wearing stretch pants and hating them. I ordered these not expecting them to work, but they fit him perfectly and are so comfortable I ordered him 2 more pair. He is so happy to be wearing blue jeans again. One caution, other styles of this brand do not fit the same as these jeans, I ordered another and have to return them and order 1 or 2 sizes bigger than the jeans
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2026

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