Best Nitrous Kits of 2025

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Nitrous kits are performance-enhancing products that are designed to increase the power output of an engine. These kits work by injecting nitrous oxide into the engine's combustion chamber, which results in a significant boost in horsepower and torque. Nitrous kits are popular among car enthusiasts who want to increase the performance of their vehicles without making significant modifications to the engine. These kits are available in a range of sizes and configurations, making them suitable for use in a variety of vehicles. Whether you're looking to improve your car's acceleration or simply want to add some extra power to your engine, a nitrous kit can help you achieve your goals.
At a Glance: Our Top Picks
Top 10 Nitrous Kits
Nitrous Express Proton Series Nitrous Kit
The Nitrous Express Proton Series Nitrous Kit is designed to provide performance, durability, and value in a compact and easy-to-mount module. Equipped with high-quality, made in the USA solenoids, this system can produce up to 250 horsepower to the wheels. Its black anodized aluminum housing not only looks great but also ensures extreme durability by pulling heat away from the solenoids. This kit is compatible with all electronic fuel-injected vehicles with a single throttle body and comes with a 10lb nitrous bottle with a standard bottle valve.
Nitrous Express - 4 Cyl Gasoline EFI Nitrous Kit (50-250HP) w/10lb Bottle
The NX Gasoline EFI Nitrous Kit is designed for those who have already upgraded their engines with high-strength internal parts. This kit features the patented NX Piranha nozzle and is adjustable up to 250 horsepower, giving you the power you need when you need it. With high-tech distribution blocks and optional Next Generation rail technology, this nitrous system is built for performance. The kit comes complete with a nitrous bottle, stainless bottle brackets, stainless hard lines, nozzles, and jetting for 100, 150, 200, and 250 horsepower. It also includes all the necessary electrical components for easy installation. Upgrade your engine and experience the thrill of increased horsepower with the NX Gasoline EFI Nitrous Kit.
NOS Powershot Universal Nitrous System Kit
The NOS Powershot universal nitrous system kit is an ideal choice for anyone seeking to boost their vehicle's performance. It comes with a set-up that ensures a safe application of nitrous power, providing an increase of up to 125 horsepower at the touch of a button. The system is also designed to create a smooth rush of power, without affecting the vehicle's fuel economy during normal driving. The kit is made of high-quality stainless steel and comes with all necessary components for an easy installation, including a 10 lb. capacity nitrous bottle, solenoids, and mounting hardware.
Nitrous Express Proton Plus Nitrous System
The Nitrous Express Proton Plus Nitrous System is a high-quality nitrous kit for electronic fuel injected vehicles with a single throttle body. The black anodized aluminum housing provides extreme durability by pulling heat away from the solenoids. This compact and easy to mount module offers a combination of performance, durability, and value. It includes jetting for up to 150 horsepower, a single Shark nozzle, and all the necessary components for installation including stainless braided nozzle lines and fuel lines, and a master arming switch.
Nitrous Express Proton Plus Nitrous Kit
The Nitrous Express Proton Plus Nitrous Kit offers a compact and easy to mount nitrous/fuel module that combines performance, durability, and value. With a capability of producing up to 250 horsepower to the wheels, this system contains a new and improved nitrous/fuel module that is compatible with progressive nitrous controllers, making it extremely durable. The system includes jetting for up to 150HP and can flow up to 250HP with the optional SHO jet kit. This kit includes a 10lb nitrous bottle with a high flow billet aluminum Lightning bottle valve, stainless bottle brackets, a single Shark nozzle, nozzle adapter, stainless braided nozzle lines, 15 foot braided stainless feed line, stainless fuel line, master arming switch, wide open throttle switch, 40 amp relay, and relay harness, as well as every nut, bolt, and electrical connector needed to complete the installation. The Nitrous Express Proton Plus Nitrous Kit is designed to fit all electronic fuel injected vehicles with a single throttle body and includes a TPS Autolearn wide open throttle module for use with all electronic fuel injected vehicles, including those with "fly by wire" electronic driven throttle bodies.
Nitrous Express Proton Plus Nitrous Kit
The Nitrous Express Proton Plus Nitrous Kit offers a compact and easy-to-mount nitrous/fuel module that combines performance, durability, and value. The new and improved nitrous/fuel module is capable of producing up to 250 horsepower to the wheels and is compatible with progressive nitrous controllers. The kit includes jetting for 35HP, 50HP, 75HP, 100HP, 125HP, and 150HP but can flow up to 250HP with the optional SHO jet kit. The kit includes a 5lb nitrous bottle, billet aluminum Lightning bottle valve, Shark nozzle, nozzle adapter, stainless braided nozzle lines, 15 foot braided stainless feed line, stainless fuel line, master arming switch, wide open throttle switch, 40 amp relay, relay harness, and all necessary nuts, bolts, and electrical connectors. The kit fits all electronic fuel injected vehicles with a single throttle body.
Nitrous Express Proton Plus Kit
The Nitrous Express Proton Plus is an advanced nitrous system designed for performance and ease of installation. With its new nitrous and fuel module, you can boost your vehicle's horsepower by up to 250 at the wheels, providing a significant power increase when needed. The kit comes with multiple jetting options, allowing you to choose between 35HP to 150HP boosts, and even higher with an optional kit. Its compatibility with progressive nitrous controllers enhances your driving experience by offering smoother power delivery. Additionally, this compact system fits all electronic fuel-injected vehicles with a single throttle body, making it a versatile choice for many car enthusiasts.
Nitrous Express Proton Nitrous Kit
The Nitrous Express Proton Kit is designed to enhance your vehicle's performance while ensuring durability and ease of installation. This compact system features high-quality solenoids made in the USA, delivering up to 250 horsepower to the wheels, giving you the extra boost you need. The black anodized aluminum housing not only adds a sleek look but also effectively dissipates heat from the solenoids, ensuring long-lasting performance. It is compatible with all electronic fuel-injected vehicles that have a single throttle body, making it a versatile choice for many car enthusiasts.
Nitrous Express 4150 Nitrous Kit
The Nitrous Express Nitrous Kit is an excellent choice for budget-conscious racers looking to enhance their vehicle's performance. This mid-level system utilizes a cutting-edge spraybarless design, ensuring that nitrous is distributed evenly for maximum efficiency. You’ll benefit from the advanced Phase 3 series plates, which offer reliable performance and superior atomization. With no spray bars to worry about, you can enjoy a hassle-free experience without the risk of airflow blockage or damage. This innovative technology allows you to focus on your racing, knowing your nitrous system is designed for optimal performance.
Nitrous Express Stage 6 Nitrous Kit
The Nitrous Express Stage 6 is an ideal choice for budget-conscious sportsman racers looking to enhance their vehicle's performance. This entry-level nitrous system utilizes advanced technology with a spraybarless design, which means fewer parts that can sag or block airflow. You can expect improved nitrous distribution and atomization, ensuring your engine receives the right mix for optimal performance. This innovation not only simplifies installation but also enhances reliability, allowing you to focus on your racing without worrying about equipment failure.
Frequently Asked Questions (FAQs)
1. Is nitrous on a car illegal?
Nitrous Oxide is not illegal to use in automobile applications on the federal level. However, there may be specific state laws that restrict or regulate its use in certain locations.
2. How much HP is a 100 shot of NOS?
A "shot" refers to the amount of horsepower added to the engine by a nitrous system. A 100 shot of NOS means it adds 100 flywheel horsepower on top of what the engine already produces. The horsepower level of the nitrous kit can be adjusted by changing the metering jets.
3. How much horsepower does nitrous add?
The amount of horsepower nitrous adds depends on the engine and the size of the nitrous shot. Generally, a small dose of nitrous can provide a boost of up to 50 horsepower, but this can vary.
4. Can you run nitrous on a stock engine?
Nitrous can be safely used on a stock engine as long as it is used properly and in moderation. It is recommended to start with a lower horsepower shot, such as 75 HP, and gradually increase it. Most stock engines can handle up to a 100 HP shot.
5. How long will a 10 pound bottle of nitrous last?
The duration of a 10-pound bottle of nitrous depends on the bottle capacity and the size of the nitrous shot being used. On a 75 HP setting, a 10 lb. bottle can last approximately 10 quarter-mile runs. On a 125 HP setting, it will last around 6 runs.
6. Can nitrous destroy an engine?
When used correctly within safe limits, a properly designed and high-quality nitrous oxide system poses little to no risk of engine damage. It is important to follow recommended guidelines and use the system responsibly.
7. How long does a 75 shot of nitrous last?
The duration of a 75 HP shot of nitrous depends on the bottle capacity and the size of the nitrous shot being used. On a 75 HP setting, a 10 lb. bottle can last approximately 10 quarter-mile runs.
8. How much HP does a 50 shot of nitrous add?
The increase in horsepower from a 50 shot of nitrous oxide depends on the RPM at which it is added. Adding a 50 shot at 6000 RPMs results in a 25% increase in cylinder pressure. Adding the same shot at 3000 RPMs can result in a 50% increase in cylinder pressure, which puts more stress on the engine.
9. How much HP does a 250 shot of nitrous add?
Adding a 250 shot of nitrous oxide can potentially increase the horsepower by 250 or more, but it is important to note that the timing may need to be adjusted to prevent engine damage. The actual increase in horsepower will depend on the baseline power of the engine.
During our nitrous kit research, we found 24 nitrous kit products and shortlisted 10 quality products. We collected and analyzed 2,728 customer reviews through our big data system to write the nitrous kits list. We found that most customers choose nitrous kits with an average price of $1,028.90.
The nitrous kits are available for purchase. We have researched hundreds of brands and picked the top brands of nitrous kits, including Nitrous Express, NOS. The seller of top 1 product has received honest feedback from 268 consumers with an average rating of 4.3.

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.