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Nitrous Express Assassin Plate Conversion 4500 ProPower(100-500HP)

SKU: NEXNX678

Powersports Nitrous Conversion and Upgrade Kits

NEX Nitrous Injection Plates...

Nitrous Express Assassin Plate Conversion 4500 ProPower(100-500HP)

SKU: NEXNX678

Powersports Nitrous Conversion and Upgrade Kits

NEX Nitrous Injection Plates...

Sale ends in Calculating...

A$890.47 A$1,108.48
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

Exclusive Nitrous Express flash sale discount at StreetFX!

Talk about timing! This is a limited offer while stocks last on various Nitrous Express part numbers. There's never been a better time to buy your Nitrous Express upgrades, so what are you waiting for?!

This item is currently on sale!

Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.

Nitrous Express Assassin Plate Conversion 4500 ProPower(100-500HP)

Additional Information

Assassin plate conversion 4500 ProPower

Product Overview

Nitrous Express Assassin Plate Conversion 4500 ProPower(100-500HP)


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 06:20:53

Data: v4.2 - Upd: 2026-11-09 19:10:18

Features

  • 4500 Assassin Plate Conversion

Important Note Regarding Nitrous & Pressurised Systems

Orders containing nitrous systems or other pressurised canisters may require additional handling and inspection prior to dispatch.

Due to the nature of these products and applicable transport and state regulations, each system is individually inspected, released, and purged where required to ensure compliance with air and road freight standards. While most orders ship within our normal timeframes, this process may occasionally result in slightly longer dispatch times than those advertised.

We do everything we can to minimise delays, and the vast majority of shipments move through without issue. If you are working to a tight deadline or require urgent delivery, please contact us prior to placing your order so we can confirm the most suitable options.

We appreciate your understanding and patience - this process ensures safe, compliant transport and delivery of your order.

(keyword: nitrous express)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Description:Nitrous Oxide Injector Plate
Part Number:nexNX678

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Nitrous Express, Nitrous Express (nx)
StreetFX SKU nexNX678
SFX Item ID 4126919
Accounting SKU nex-NX678
Manufacturer SKU NX678
Manufacturer UPC 653374979894
Alternative References NEX-NX678, NX678

Nitrous Express Assassin Plate Conversion, 4500 ProPower, Black Anodized, Aluminum, Universal, Kit

Nitrous Express Assassin plate conversion ProPower kits provide superior distribution and outstanding atomization. With no spray bars to sag, split, block airflow, or damage, these NX billet plate conversion ProPower kits are truly the next generation in nitrous plate technology. The Assassin is the most technically advanced single stage plate ever designed. The CNC-machined design integrates the nitrous and fuel discharge ports into the outer perimeter. These plate conversion ProPower kits offer a unique perimeter spray pattern that assures perfect nitrous-fuel distribution, which in turn solves the problems commonly found on single plane manifolds, particularly small and big block Fords.

Assassin plate conversion ProPower kits include:
• Nitrous Assassin billet plate with black anodized finish
• Stainless braided lines
• Jetting from (100-500 hp)
• Carb Studs

Product Attributes
BrandNitrous Express (NX)
Manufacturer's Part NumberNX678
Part TypePowersports Nitrous Conversion and Upgrade Kits
Product LineNitrous Express Assassin Plate Conversion ProPower Kits
UPC653374979894
QuantitySold as a kit.
NotesFor use with 4500 carburetors.

Manufacturer Attributes
Product Class Nitrous Oxide Injector Plate
Construction/Type Assassin plate conversion 4500 ProPower.
Market Description Assassin plate conversion 4500

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