Nitrous Express Proton Plus Nitrous Kit w/5lb Bottle

SKU: NEX20421-05

Nitrous Oxide Systems

NEX Nitrous Oxide Kits

Nitrous Express

Nitrous Express Proton Plus Nitrous Kit w/5lb Bottle

SKU: NEX20421-05

Nitrous Oxide Systems

NEX Nitrous Oxide Kits

Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.

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Description

Proton Series nitrous systems combine performance, durability and value in a compact and easy to mount module. Proton systems contain high quality, made in the USA, solenoids that are capable of producing 150 horsepower to the wheels. The black anodized aluminum housing not only looks great, it pulls heat away from the solenoids for extreme durability. This Proton Plus system includes jetting for 35HP, 50HP, 75HP, 100HP, 125HP and 150HP. This system also includes a 5lb nitrous bottle with an aluminum high flow Lightning 45 bottle valve, stainless bottle brackets, a single Shark nozzle, nozzle adapter, stainless braided nozzle lines, extra long braided stainless feed line, stainless fuel line, master arming switch, wide open throttle switch, 40 amp relay, relay harness as well as every nut, bolt and electrical connector needed to complete the installation. Fits all electronic fuel injected vehicles with a single throttle body.

Product Overview

Features and Benefits

Incl. All Hardware To Complete The Installation

Product Details


Add-On Part:	11100, 15940, 16006, 18959, 11107
Bottle Capacity:	5
Bottle Color:	White
Bottle Included:	Yes
Description:	Nitrous Oxide Injection System Kit
Hose Color:	Stainless
Hose Material:	Stainless Braided
Part Number:	nex20421-05
Prop 65 (C, R or CR):	CR
Prop 65 - Short Label:	prop65_warning.jpg
Prop 65 Yes/No:	Yes
Title:	Nitrous PROTON PLUS NITROUS SYSTEM W/ 5LB BOTTLE
Type:	Universal EFI
Usage:	Street/Performance
WARNING CA Proposition 65 Message:	Warning: Cancer and Reproductive Harm-www.P65Warnings.ca.gov.
WARNING CA Proposition 65:	Yes

Part Type

Nitrous Oxide Injection System Kit

Data: v4.2 - Upd: 2026-10-05 04:20:27

Features

Incl. All Hardware To Complete The Installation

Specifications

Product Attributes - Brand: Nitrous Express (NX)
Product Attributes - Manufacturer's Part Number: 20421-05
Product Attributes - Part Type: Nitrous Oxide Systems
Product Attributes - Product Line: Nitrous Express Proton Plus Series Nitrous Systems
Product Attributes - UPC: 653374307390
Product Attributes - Delivery Style: Air intake tube
Product Attributes - Nitrous System Style: Wet
Product Attributes - Nitrous System Intended Fuel Type: Gasoline
Product Attributes - Maximum Advertised Horsepower Increase: 150
Product Attributes - Activation: Microswitch
Product Attributes - Jet Sizes Included (hp): 35, 50, 75, 100, 125, 150
Product Attributes - Bottle Included: Yes
Product Attributes - Nitrous Bottle Capacity: 5 lbs.
Product Attributes - Dual Stage: No
Product Attributes - Bottle Material: Aluminum
Product Attributes - Bottle Color: White
Product Attributes - Bottle Brackets Included: Yes
Product Attributes - Bottle Bracket Material: Stainless steel
Product Attributes - Quantity: Sold as a kit.

Reference Information

Brand Name/s	Nitrous Express
StreetFX SKU	nex20421-05
SFX Item ID	4125816
Supplier Item Code	4125816
Manufacturer SKU	20421-05
Manufacturer UPC	653374307390
Alternative References	w/5lb