SKU: 33823645657

Holley Water Injection Pump (HO557-100)

Sale price$270.90 Regular price$301.00
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Description

Holley Water Injection Pump (HO557-100)HO557 100 WATER METHANOL PUMP Water Methanol Part Number: HO557 100 Take your forced induction ride to the next level with a Holley water meth injection system! Integrated into the Holley HP and Dominator EFI Systems is the capability to control water methanol injection, allowing you to safely run on lower octane pump gas! What makes the Holley water methanol system unique and light years ahead of competitive systems, is that the solenoid flow has

HO557-100 - WATER/METHANOL PUMP

Water/Methanol

Part Number: HO557-100

Take your forced induction ride to the next level with a Holley water/meth injection system! Integrated into the Holley HP and Dominator EFI Systems is the capability to control water/methanol injection, allowing you to safely run on lower octane pump gas!
What makes the Holley water/methanol system unique and light years ahead of competitive systems, is that the solenoid flow has been characterized within the ECU. Program in an exact flow amount into the software, and that flow is injected into the engine. This is critical to ensure that neither too little (causing engine damage), nor too much (causing a large loss in power) water/methanol mix is injected into the engine. Select the exact percentage of water/methanol mix to be delivered vs. the percentage of fuel flow present, at any RPM and load. This makes tuning a very simple and accurate process.
All components are designed to be compatible with water/methanol mix of up to 50% methanol. The Water/Meth solenoids are run by an injector driver output. If an extra output is not available (as would be the case on a HP ECU driving 8 injectors), PN 554-115 can be purchased that can be driven by a low side PWM output.

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SKU: 33823645657

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Pearl
San Leandro, US
★★★★★ 3
Changing the modes
Color: light blue
They liked it at first without the vibration. Not able to adjust the vibration speed it goes to fast .
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Reviewed in the United States on May 28, 2026
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Verified Purchase
Theresa N Riley
Houston, US
★★★★★ 5
Fun, Durable Toy That Keeps Dogs Entertained
Color: light blue
This interactive dog toy has been great for keeping my dog fairly active and engaged. The auto-bounce and rotating features grab attention instantly, and the chew-resistant material holds up well. You can also turn the multicolored lights on to play in the dark or just have a fun time while your pet chases the ball. It is so easy to use, rechargeable, and perfect for burning energy indoors or outside. 🐶 Although both my dogs were sorta interested…due to colder temperatures (they are elder dogs) they probably would have had more fun, if the weather was warmer. I also tried to entertain the neighbors poodle too!
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Reviewed in the United States on March 18, 2026
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Nick
Phoenix, US
★★★★★ 5
Fun ball for dog
Color: light blue
This is a great toy for the dog. So far the ball is still complete by chewing several days. I have to say it is perfect size for the big dog. The ball is light and also has a changeable light and models.
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Reviewed in the United States on May 18, 2026
K
Verified Purchase
Kim
Bozeman, US
★★★★★ 5
For medium
Color: light blue
So far this ball is holding up. Others I have purchased have fallen apart. I highly recommend if your dog is an aggressive chewer
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Reviewed in the United States on March 21, 2026
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Ray
Carnegie, US
★★★★★ 5
Dog favorite new ball toy
Color: light blue
Easy to use dog ball. Made out of rubber and you can do vibration with it opens in half. Solid ball and rolls smoothly. It’s quiet and my dog loves it.
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Reviewed in the United States on May 26, 2026

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