Holley's bracketless Mid-Mount accessory system now covers small block Chevrolet engines, bolting accessories directly to the water pump for a clean, integrated look with strong engine visibility. The kit shares its LT1-style alternator and water pump design with the C7 Corvette, and pairs a compact SD7 A/C compressor with a Type II power steering pump and baffled reservoir.
Specifications:
- Accessory Drive Style: Mid-Mount
- Engine: Chevrolet Small Block Gen I
- Finish: Natural Cast
- Material: Cast Aluminum
- Inlet ID/OD: 35.4mm/1.4" — 48mm/1.9"
- A/C Compressor: SD7 (included)
- Alternator: 150 Amps (included)
- Power Steering Pump, Pulley, Reservoir, Hardline: Included
- Pulley Style: Serpentine
- Belt, Tensioner, Water Neck, Water Pump: Included
- Sub Category: Accessory Drive Belt System Components
- Warning: California Proposition 65
- Warranty: Manufacturer's Limited 90 Day Warranty
- Part Number: 20-240
The included power steering pump can also be used with Hydroboost systems — refer to the flow specs on part number 198-101. Hidden thermostat bypass and heater hose ports come with NPT line adapters, and a power steering hardline-to-AN -6 adapter is included.
FAQ
What engines does the 20-240 kit fit?
Small block Chevrolet Gen I engines.
What's included in the kit?
Water pump, A/C compressor, alternator, and power steering pump with reservoir, plus all pulleys, belt, and adapters.
Can this power steering pump work with a Hydroboost system?
Yes — refer to the flow specs on part number 198-101.
What finish is this kit?
Natural cast aluminum (black also available).

