This bracketless Mid-Mount accessory drive system bolts directly to the water pump for a clean, integrated look with strong engine visibility. 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: Cast (natural)
- Material: Cast Aluminum
- Inlet Size: 35.4mm/1.4"
- Pulley Style: Serpentine
- Part Number: 20-185
Fits all wet-sump LS engines except supercharged applications (dry-sump LS engines converted to wet sump also fit). Works with common aftermarket and factory throttle bodies/intakes, VVT applications, and Hooker turbo manifolds. The included power steering pump can be used with Hydroboost systems — refer to the flow specs on part 198-101.
FAQ
What's included in this complete system?
Water pump, SD7 A/C compressor, 150-amp alternator, power steering pump with reservoir, crank damper, all pulleys, belt, heater hose adapters, P/S-to-AN hardline, and alternator harness.
Will this fit a supercharged LS engine?
No, it fits all wet-sump LS engines except supercharged applications.
Does this work with VVT engines?
Yes, it's compatible with VVT applications as well as Hooker turbo manifolds.
What is the part number?
Holley part number 20-185.
