Holley's Premium Black Mid-Mount Complete Accessory System is designed for LS engine swaps and completes Holley's trilogy of LS accessory drive solutions alongside the High- and Low-Mount options. The bracketless design bolts accessories directly to the water pump, and bottom heater outlets provide extra clearance for swap applications.
Specifications:
- A/C Compressor: SD7, included
- Alternator: 150-amp, LT1-style, included
- Power Steering: Type II pump with baffled reservoir, included
- Damper: SFI-certified with hard-anodized billet 6061-T6 crank pulley
- Water Pump: LT1-style cartridge design, included
- Finish: Black
- Application: LS Engines
- Part Number: 20-180BK
Fits all wet-sump LS engines except supercharged applications; also fits dry-sump LS engines converted to wet sump. Works with common aftermarket and factory throttle bodies, intakes, VVT applications, and Hooker turbo manifolds. The power steering pump included can be used with Hydroboost systems; refer to the flow specs on part number 198-101.
FAQ
What's included in this system?
The water pump, A/C compressor, alternator, power steering pump with reservoir, and an SFI-certified damper with hard-anodized billet crank pulley, plus all pulleys, belt, and adapters.
What LS engines does this fit?
All wet-sump LS engines except supercharged versions, and dry-sump LS engines converted to wet sump.
Does it include a damper?
Yes, an SFI-certified damper with a hard-anodized billet 6061-T6 aluminum crank pulley.
Can the power steering pump run a Hydroboost system?
Yes; refer to the flow specs on part number 198-101.

