Air and Fuel› Nitrous Oxide Systems and Components

Holley

WM INSTALLATION KIT

$517.73

SKU: H00E 557-101

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Holley 557-101 water/methanol installation kit is designed for forced induction vehicles to allow safe operation on lower octane pump gas through precise control of water/methanol injection when integrated with Holley HP and Dominator EFI Systems.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHolley
Part NumberH00E 557-101
Weight1.9 lb

Videos

Holley Water Methanol Injection Components

Holley Water Methanol Injection Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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