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Short ram intake systems replace the factory intake with a shorter, less restrictive intake path that improves airflow and throttle response. These systems draw air from the engine bay and are known for enhanced induction sound and straightforward installation compared to longer cold air intake setups.
We carry Injen short ram intake kits for the Ford Focus ST, covering 2013 to 2018 model years. Injen's SP series intakes use a dry SuperNano-Web filter and aluminum piping for improved airflow and a more aggressive induction note over the stock setup.
For Subaru WRX and STI owners researching intake options, our guide on WRX intake upgrades: cold air vs short ram explains the differences and when each makes sense. For a broader look at first-step performance upgrades, the WRX bolt-on upgrades guide covers how intake upgrades fit into the full bolt-on stack.
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Select options
This product has multiple variants. The options may be chosen on the product page
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Select options
This product has multiple variants. The options may be chosen on the product page
Short Ram vs Cold Air Intake: Which Is Right for Your Build?
Short ram intakes prioritize throttle response and induction sound, drawing air from within the engine bay. Cold air intakes route the filter to a cooler location outside the engine bay, which can improve intake air temperature at the cost of a more complex installation.
For most street builds focused on sound and simplicity, a short ram intake is a strong starting point. Builds focused on maximum airflow and temperature management at higher power levels typically benefit from a cold air setup. Our guide on WRX intake upgrades: cold air vs short ram breaks down the full comparison.
Frequently Asked Questions
What does a short ram intake do?
A short ram intake replaces the factory airbox with a shorter, less restrictive intake tube and high-flow filter. This improves airflow to the engine, resulting in improved throttle response, a more aggressive induction sound, and modest performance gains when paired with proper tuning.
Is a short ram intake better than a cold air intake?
It depends on the build and driving conditions. Short ram intakes prioritize throttle response and simplicity. Cold air intakes draw cooler air from outside the engine bay, which can improve intake temperatures under sustained load. For most street builds, a short ram is an easy and effective first upgrade.
Do I need a tune after installing a short ram intake?
On most modern turbocharged platforms, a tune is recommended after installing an intake to ensure the ECU properly accounts for the increased airflow. Running an intake without a supporting tune can leave performance gains on the table.
What vehicles do these short ram intakes fit?
The Injen short ram intake kits on this page fit the Ford Focus ST from 2013 to 2018. For other vehicle applications, use the vehicle selector above or contact the team directly for fitment assistance.
Related Intake and Airflow Upgrades
- Cold Air Intakes for builds focused on lower intake temperatures and maximum airflow.
- Air Intake Components supporting components and hardware for intake system builds.
- Intercooler Kits commonly paired with intake upgrades to reduce intake air temperatures under boost.
- WRX Turbo and Airflow Upgrades Guide explore the full airflow upgrade path for WRX builds.
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