
Holley 20-242BK BBC Mid-Mount Complete Accessory System
Holley designed this 20-242BK Mid-Mount Complete Accessory System for Big Block Chevy engines. At the heart of the system is a "bracketless" design, where the accessories bolt directly to the water pump for a clean, integrated form. This system has all accessories pulled in tighter than other drives.
The design offers superb visibility to show off your engine, not your accessories. This system shares several design efficiencies with 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 as well as heater ports are recessed into the manifold.
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: water pump, A/C compressor, alternator, as well as P/S pump with reservoir. The belt, all pulleys, A/C line adapter, heater hose adapters, power steering to -6 AN hardline as well as the alternator plug/harness come included.
Color graphical instructions walk you through every step of the ultra easy installation.
Main Features:
- Bracketless mounting with ultra easy assembly
- O-ring seal to engine
- Hidden thermostat bypass and heater hose ports with NPT line adapters
- LT1 style premium alternator
- LT1 style water pump design
- Compact SD7 A/C compressor as well as line adapter
- Type II power steering pump with baffled reservoir
- P/S adapter hardline to AN -6 adapter
- OE pulley ratios for optimal performance
- Billet alternator, tensioner, as well as compressor pulley covers
Holley 20-242BK Complete Accessory System Additional Features:
- Belt Type: Serpentine
- Belt Included: Yes
- Water Pump Included: Yes
- Water Pump Rotation: Counterclockwise
- Water Pump Material: Cast Aluminum
- Power Steering Pump Pulley Included: Yes
- Alternator Pulley Included: Yes
- Air Conditioning Compressor Pulley Included: Yes
- Power Steering Pump Included: Yes
- Power Steering Pump Reservoir Included: Yes
- Air Conditioning Compressor Included: Yes
- Alternator Included: Yes
- Alternator Amps: 150
- Alternator Style: 1-Wire
- Tensioner Included: Yes
- Idler Included: No
- Hardware Included: Yes
- Quantity: Sold as a kit
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!
Original: $2,202.95
-65%$2,202.95
$771.03More Images



Holley 20-242BK BBC Mid-Mount Complete Accessory System
Holley designed this 20-242BK Mid-Mount Complete Accessory System for Big Block Chevy engines. At the heart of the system is a "bracketless" design, where the accessories bolt directly to the water pump for a clean, integrated form. This system has all accessories pulled in tighter than other drives.
The design offers superb visibility to show off your engine, not your accessories. This system shares several design efficiencies with 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 as well as heater ports are recessed into the manifold.
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: water pump, A/C compressor, alternator, as well as P/S pump with reservoir. The belt, all pulleys, A/C line adapter, heater hose adapters, power steering to -6 AN hardline as well as the alternator plug/harness come included.
Color graphical instructions walk you through every step of the ultra easy installation.
Main Features:
- Bracketless mounting with ultra easy assembly
- O-ring seal to engine
- Hidden thermostat bypass and heater hose ports with NPT line adapters
- LT1 style premium alternator
- LT1 style water pump design
- Compact SD7 A/C compressor as well as line adapter
- Type II power steering pump with baffled reservoir
- P/S adapter hardline to AN -6 adapter
- OE pulley ratios for optimal performance
- Billet alternator, tensioner, as well as compressor pulley covers
Holley 20-242BK Complete Accessory System Additional Features:
- Belt Type: Serpentine
- Belt Included: Yes
- Water Pump Included: Yes
- Water Pump Rotation: Counterclockwise
- Water Pump Material: Cast Aluminum
- Power Steering Pump Pulley Included: Yes
- Alternator Pulley Included: Yes
- Air Conditioning Compressor Pulley Included: Yes
- Power Steering Pump Included: Yes
- Power Steering Pump Reservoir Included: Yes
- Air Conditioning Compressor Included: Yes
- Alternator Included: Yes
- Alternator Amps: 150
- Alternator Style: 1-Wire
- Tensioner Included: Yes
- Idler Included: No
- Hardware Included: Yes
- Quantity: Sold as a kit
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!
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Description
Holley designed this 20-242BK Mid-Mount Complete Accessory System for Big Block Chevy engines. At the heart of the system is a "bracketless" design, where the accessories bolt directly to the water pump for a clean, integrated form. This system has all accessories pulled in tighter than other drives.
The design offers superb visibility to show off your engine, not your accessories. This system shares several design efficiencies with 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 as well as heater ports are recessed into the manifold.
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: water pump, A/C compressor, alternator, as well as P/S pump with reservoir. The belt, all pulleys, A/C line adapter, heater hose adapters, power steering to -6 AN hardline as well as the alternator plug/harness come included.
Color graphical instructions walk you through every step of the ultra easy installation.
Main Features:
- Bracketless mounting with ultra easy assembly
- O-ring seal to engine
- Hidden thermostat bypass and heater hose ports with NPT line adapters
- LT1 style premium alternator
- LT1 style water pump design
- Compact SD7 A/C compressor as well as line adapter
- Type II power steering pump with baffled reservoir
- P/S adapter hardline to AN -6 adapter
- OE pulley ratios for optimal performance
- Billet alternator, tensioner, as well as compressor pulley covers
Holley 20-242BK Complete Accessory System Additional Features:
- Belt Type: Serpentine
- Belt Included: Yes
- Water Pump Included: Yes
- Water Pump Rotation: Counterclockwise
- Water Pump Material: Cast Aluminum
- Power Steering Pump Pulley Included: Yes
- Alternator Pulley Included: Yes
- Air Conditioning Compressor Pulley Included: Yes
- Power Steering Pump Included: Yes
- Power Steering Pump Reservoir Included: Yes
- Air Conditioning Compressor Included: Yes
- Alternator Included: Yes
- Alternator Amps: 150
- Alternator Style: 1-Wire
- Tensioner Included: Yes
- Idler Included: No
- Hardware Included: Yes
- Quantity: Sold as a kit
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!












