How Does a Short Ram Intake System Affect the Performance of a Mitsubishi Lancer Evolution?

If you are an automotive enthusiast, or if you just want to squeeze all the possible performance out of your Mitsubishi Lancer Evolution (Evo), then it’s essential to understand how a short ram intake system can impact your vehicle. A short ram intake, often abbreviated to SRI, is a type of aftermarket air intake for vehicles with internal combustion engines. It uses a short aluminum pipe and a high-flow air filter to draw in cooler, denser air into the engine, maximizing combustion and output. In this article, we’ll delve into the specifics of how this system can enhance your Evo’s overall performance.

Influence of the Short Ram Intake on Performance

The short ram intake system, typically characterized by its shorter and wider pipe, is devised to pull in a larger volume of air. The primary function of this modification is to replace the restrictive factory-installed air box, providing your Mitsubishi Lancer Evolution with a noticeable bump in horsepower and torque. More air means more power, and this simple change can provide a significant performance boost.

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When you install a short ram intake system, you move the intake point closer to the engine, allowing air to travel a shorter distance, reducing restriction, and improving throttle response. Having a high-quality air filter, such as ones from K&N or Injen, can also affect your vehicle’s performance by ensuring cleaner air enters the engine. Cleaner air entering the engine can optimize combustion, reducing the possibility of engine damage and promoting longevity.

Comparing Different Brands: HPS, AMS, and Injen

When it comes to short ram intake systems, the brand you choose can make a significant difference. HPS, AMS, and Injen are all prominent manufacturers in this market, each offering unique features that can affect your Mitsubishi Lancer Evo’s performance.

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HPS (Heatshield Products Inc.) is known for its extensive range of intake kits crafted from high-grade aluminum. The HPS intake kit for the Mitsubishi Lancer Evo features a high-flow air filter and a mandrel-bent aluminum tube to ensure minimal restriction. AMS (Automotive Modification System) specializes in high-performance automotive parts, and their short ram intake kit includes a larger MAF (Mass Air Flow) housing that provides improved air delivery.

Injen, on the other hand, offers a truly unique intake system. Dubbed the SP series, these intake systems feature a patented MR Technology process that adjusts the air-fuel ratio to ensure optimal performance. The Injen SP series intake for the Lancer Evo is designed to provide a smooth intake stroke, maximizing power and torque throughout the entire rev range.

Pricing and Purchasing Options

Price is a critical factor when considering a short ram intake, as different brands and models can range dramatically in cost. You can find these products at various retailers, such as Amazon, or direct from the manufacturers.

The HPS Performance Short Ram Air Intake Kit, for instance, is priced around $180 on Amazon. It includes a high-flow air filter, a heat shield, and all the necessary hardware for installation. AMS Performance’s intake system, on the other hand, is slightly more expensive, typically retailing around $250. The higher price tag is justified by the inclusion of the larger MAF housing and the high-quality construction. Injen’s SP series intake system is a premium product and is priced accordingly at around $300.

Installation and Maintenance Considerations

The installation of a short ram intake system on your Mitsubishi Lancer Evo is relatively straightforward. Most kits come with all the necessary hardware and detailed instructions. However, if you’re not comfortable performing the installation yourself, it can be a good idea to have a qualified mechanic do the job.

Maintenance of your short ram intake system is equally important for ensuring optimal performance. The air filter, for instance, will need regular cleaning or replacement, depending on the type of filter included with your kit. Many high-quality filters, like those from K&N and Injen, are reusable and only need to be cleaned periodically. This not only saves you money on replacement filters but also ensures your intake system is always operating at its best.

While the short ram intake system will significantly improve your Mitsubishi Lancer Evo’s performance, it’s crucial to remember that this is only one component of the vehicle’s overall performance. Many other performance-enhancing modifications can be made, including turbo upgrades, exhaust system changes, and ECU tuning. However, a high-quality short ram intake system can indeed provide a noticeable boost in horsepower, torque, and throttle response, making it a worthwhile investment for any Evo owner looking for extra performance.

How to Choose the Right Short Ram Intake for Your Lancer Evo

When examining the various short ram intake options for your Mitsubishi Lancer Evolution, there are a few key factors to consider. The material of the intake pipe plays a crucial role in its effectiveness. High-quality, mandrel-bent stainless steel pipes, like those used in HPS Performance kits, are designed to ensure minimal restriction to airflow.

Another crucial factor is the air filter included in the kit. Brands like K&N and Injen are renowned for their high-flow air filters, which not only provide cleaner air for combustion but can also be cleaned and reused, saving you money in the long run.

The performance gains, in terms of horsepower and torque, can vary between different intake kits. Some kits, like Injen’s SP series, even offer unique features like a patented MR Technology process that adjusts the air-fuel ratio for optimal performance throughout the entire rev range.

Lastly, consider the installation process. While installing a short ram intake system is straightforward for most, it can be beneficial to choose a kit that includes in-depth instructions and all necessary hardware. If you’re not comfortable doing it yourself, remember that a qualified mechanic can do the job.


In conclusion, a short ram intake system is a valuable modification for anyone looking to boost the performance of their Mitsubishi Lancer Evolution. The benefits of a short ram intake, including increased horsepower and torque and improved throttle response, make it a worthwhile investment.

Choosing the right intake system for your Evo requires careful consideration of the material, air filter, performance gains, and installation process. Brands like HPS, AMS, and Injen offer high-quality options, each with unique features that can enhance your vehicle’s performance.

Whether you’re an automotive enthusiast or just want to squeeze every bit of performance out of your Evo, a short ram intake system can provide a noticeable improvement. Remember, maintaining your intake system, particularly the air filter, is vital for ensuring it continues to operate at its best. And while a short ram intake can significantly boost performance, it’s just one of many modifications you can make to your Mitsubishi Lancer Evolution to unlock its full potential.