This bracketless, black-finished Mid-Mount accessory drive system bolts directly to the water pump for a clean, integrated look. It includes a 150-amp 6-phase alternator, SD7 A/C compressor, Type II power steering pump with baffled reservoir, water pump, crank damper, all pulleys, and belt.
Specifications:
- Brand: Holley
- Category: Belts and Cooling
- Engine: GM Gen III/IV (LS)
- Accessory Drive Style: Mid-Mount
- A/C Compressor Type: SD7
- Alternator: 150 Amps
- Water Pump, Damper, Thermostat Included: Yes
- Finish: Black
- Material: Cast Aluminum
- Inlet Size: 35.4mm/1.4"
- Pulley Style: Serpentine
- Part Number: 20-185BK
Fits all wet-sump LS engines except supercharged applications (dry-sump LS engines converted to wet sump also fit). Optional A/C pulley cover (97-185) and alternator pulley cover (97-187) are available separately. The included power steering pump can be used with Hydroboost systems — refer to the flow specs on part 198-101.
FAQ
How is this different from the natural-finish 20-185?
It's the same complete Mid-Mount accessory system, but with a black finish instead of natural cast.
What's included in this system?
Water pump, SD7 A/C compressor, 150-amp alternator, power steering pump with reservoir, crank damper, all pulleys, belt, heater hose adapters, and P/S-to-AN hardline.
Are pulley covers available?
Yes, an optional A/C pulley cover (97-185) and alternator pulley cover (97-187) are sold separately.
What is the part number?
Holley part number 20-185BK.
