Injen Technology Intakes, Exhausts & Cooling

Injen's intake lineup covers two main configurations for most vehicles. Their cold air intake systems position the air filter as far from engine heat as possible, typically in the fender well or below the engine, to draw in the densest, coolest air available. Their short ram intake systems replace the factory airbox with a shorter aluminum pipe and cone filter positioned inside the engine bay, which is simpler to install and eliminates any risk of water ingestion through the filter.

Owner reviews of Injen intakes consistently highlight the intake sound as one of the main reasons buyers choose the brand. Under normal driving the intake note is subtle, but under acceleration the induction sound is noticeably more aggressive than stock without being obnoxious. Injen's SP series is their flagship cold air intake line and is the most widely reviewed Injen product across Honda, Toyota, Subaru, and Nissan platforms.

Cold Air Intake vs Short Ram Intake: Which Should You Choose?

Cold Air Intake
Draws in air from outside the engine bay, typically through the fender or wheel well. Because cooler air is denser, a cold air intake generally produces better power gains than a short ram, particularly at higher RPMs. The tradeoff is a more involved installation and the small risk of hydrolocking in very deep water if the filter becomes submerged. Injen offers hydro shields as an optional accessory for their cold air intake systems for drivers in rainy climates.

• Filter positioned away from engine heat for denser, cooler air
• Generally stronger top-end power gains than short ram
• More complex installation, typically 1 to 2 hours
• Small hydrolock risk in deep standing water without a hydro shield
• Best for: performance builds, warm climates, drivers who want maximum gains

Short Ram Intake
Replaces the factory airbox with a shorter aluminum pipe and filter positioned inside the engine bay. Easier to install, no hydrolock risk, and generally produces better throttle response at lower RPMs where most street driving happens. The tradeoff is that air drawn from inside the engine bay is warmer and less dense than outside air, which limits peak power gains compared to a true cold air system.

• Filter positioned inside the engine bay
• Easier installation, typically 30 to 60 minutes
• Better low-end throttle response on many applications
• No hydrolock risk
• Best for: daily drivers, rainy climates, simpler installations

For a more detailed breakdown of which is right for your specific build, see our full cold air intake vs short ram guide.

Frequently asked questions

Is Injen a good intake brand?
Yes. Injen Technology is a California-based manufacturer that holds four patents on the tuning process of an air intake system, making them the first company to develop a tuned intake design. Owner reviews across Honda, Toyota, Subaru, Nissan, and other platforms consistently rate Injen intakes highly for build quality, fitment, and intake sound. They are consistently ranked alongside K&N and AEM as one of the top three aftermarket intake brands in the enthusiast market.

What is the difference between Injen cold air intake and short ram intake?
A cold air intake positions the filter outside the engine bay to draw in cooler, denser air, which generally produces better power gains, especially at higher RPMs. A short ram intake keeps the filter inside the engine bay for a simpler installation with no hydrolock risk and better low-end throttle response on many vehicles. The right choice depends on your climate, driving style, and how much installation complexity you want to take on.

Does an Injen cold air intake add horsepower?
Yes on most applications. Cold air intakes increase airflow and reduce intake temperatures, which allows the engine to produce more power. Gains vary by vehicle and engine but are typically in the range of 5 to 15 horsepower. Turbocharged vehicles often see more noticeable gains since the turbocharger benefits from a larger volume of cooler, denser air.

Will an Injen intake void my warranty?
Under the Magnusson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket air intake. However, if an intake modification causes a specific component failure, the manufacturer can decline to cover that component. If your vehicle is still under factory warranty, review your terms before installing any aftermarket parts.

Can an Injen cold air intake hydrolock my engine?
Hydrolocking occurs when water enters the intake and reaches the engine cylinders. With a cold air intake the filter is positioned in or near the wheel well, which means deep standing water is a potential risk. Under normal driving conditions including rain and light puddles this is not a concern. Injen offers optional hydro shields for their cold air intake systems that significantly reduce this risk for drivers in wet climates.

Does Injen make exhausts?
Yes. In addition to their intake lineup, Injen makes cat-back exhaust systems and axle-back systems for select vehicles. Their exhaust systems are built from stainless steel and are designed to complement the intake sound profile, giving the engine a more aggressive note at both ends.