Holley's Premium Mid-Mount complete accessory system for LS engines uses a bracketless design where accessories bolt directly to the water pump for a clean, integrated look and better engine visibility. The kit includes an SFI certified damper with hard-anodized billet crank pulley, a 150-amp LT1-style alternator, an SD7 A/C compressor, and a Type II power steering pump with baffled reservoir, in natural cast finish.
Specifications:
- Accessory Drive Style: Mid-Mount
- Engine: GM Gen III/IV (LS)
- Alternator: 150 Amp (included)
- A/C Compressor: SD7 (included)
- Damper: SFI Certified, hard-anodized billet crank pulley (included)
- Water Pump, Water Neck & Pulley: Included
- Power Steering Pump, Hardline & Reservoir: Included
- Inlet Size: 35.4mm / 1.4"
- Finish: Natural Cast
- Material: Cast Aluminum
- Part Number: 20-180
Fits all wet sump LS engines except supercharged applications; also fits dry sump LS engines converted to wet sump. Works with VVT applications, common aftermarket/factory throttle bodies and intakes, and Hooker turbo manifolds. The power steering pump can be used with Hydroboost systems (refer to flow specs on part 198-101).
FAQ
What's included with the Holley 20-180 Premium Mid-Mount system?
A water pump, SD7 A/C compressor, 150-amp alternator, Type II power steering pump with reservoir, and an SFI certified damper — all pulleys and belt included, natural cast finish.
What engines does the 20-180 fit?
All wet sump GM LS engines except supercharged applications; it also fits dry sump LS engines converted to wet sump.
Is this system compatible with VVT engines?
Yes, it's compatible with VVT applications as well as common aftermarket and factory throttle bodies, intakes, and Hooker turbo manifolds.
