Nitrous Outlet GM Holley Hi-Ram Dual Stage Intake Spacer Plate System - Gas/E85 (5-55psi)(50-300HP)(12lb Bottle)

Nitrous Outlet GM Holley Hi-Ram Dual Stage Intake Spacer Plate System - Gas/E85 (5-55psi)(50-300HP)(12lb Bottle)

Marsoni

M251S

$1881.49

Get it in 3 business days with 1 day shipping. Friday, May 29

Nitrous Outlet GM Holley Hi-Ram Dual Stage Intake Spacer Plate System - Gas/E85 (5-55psi)(50-300HP)(12lb Bottle)Flow Up To 400 HP Dual Stage Billet Aluminum Nitrous Spacer Plate 400+HP Solenoids E85 Compatible With Different Jetting All Hardware, Electrical, Brackets, Gasket, and Jetting Included Includes Jetting for 50 100 150 200 250 300 HP Flow Up To 400HP. This dual stage spacer plate system comes out of the box with everything you need to spray up to 300 HP, but can spray up to 400HP with additional jetting. This system can easily be converted to a dual

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Had everything I needed plus some extra parts in the kit. I probably could have just replaced the impeller for slightly less but while everything was disassembled you might as well replace the works. Included - Water Pump Impeller, Housing, Key, Face Plate, Face Plate Gasket, O-Ring, Seal Face and Carrier Assembly Oil Seal

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Reviewed in the United States on October 28, 2025

Verified Purchase

chris null

Whiting, US

★★★★★ 5

Water impeller kit

Worked perfectly for my ‘02 Rinker Captiva 212 with the 5.7 Mercruiser Aloha one outdrive !

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Reviewed in the United States on October 9, 2025

Verified Purchase

Jmac

Whiting, US

★★★★★ 4

Good quality, but could have used better instructions

The kit was complete, and all the components were well made. However, if you aren't somewhat mechanical, it would be fairly easy to install the gaskets and backing plate in the wrong sequence. With better instructions, this would be a 5 star plus kit.

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Reviewed in the United States on July 31, 2025

Verified Purchase

ross

Alexandria, US

★★★★★ 5

Don't pay boat shops for over priced services!

Boat shop wanted $400 dollars for a new water pump replacement. Got this on Amazon and watched a few utube videos. Took less then 2hrs to take apart and replace. I put it in a Alpha 1 gen 2 lower. Very simple process.

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Reviewed in the United States on May 24, 2025