MST Performance Honda Civic Si Air Intake Kit

MST Performance Honda Civic Si Air Intake Kit (MST-HD-SI1501)

This air intake kit from MST Performance is a straightforward upgrade for the 2017 Honda Civic Si, designed to replace the factory airbox with a freer-flowing system that feeds cooler, denser air directly to the turbocharger. The result is improved throttle response, a more noticeable intake sound, and measurable power gains over the standard setup.

What Does It Do?

The standard airbox fitted to the Civic Si is designed with cost and noise reduction in mind, not performance. It restricts airflow and can limit what the turbocharged engine is capable of. This MST Performance kit removes that restriction, allowing a greater volume of cold air to reach the turbo more efficiently. More air means better combustion, which translates to improved throttle response and usable power gains across the rev range.

MST Performance quote dyno-tested gains of 12-14bhp (a dyno is a machine used to measure a car’s power output). Please note: actual gains will vary depending on your vehicle’s condition, state of tune, and other modifications. These figures represent maximum recorded gains and should be treated as a guide rather than a guarantee.

This kit is a worthwhile upgrade whether your Civic Si is completely standard or already running other modifications. It works well alongside an ECU remap (a software tune of the engine’s control unit) and is a popular first step in a performance build.

What’s Included?

• Black powder-coated heat shield – helps keep heat from the engine bay away from the intake
• Black powder-coated inlet pipe
• Red dry pleated performance air filter – easy to clean and maintain, no oiling required
• Silicone joiner to connect components securely
• Full fitting hardware and step-by-step instructions

Why MST Performance?

MST Performance are well regarded in the performance aftermarket for producing intake kits that balance quality, value, and genuine results. The use of powder-coated pipework and a heat shield shows attention to detail – these aren’t just cosmetic touches, they help the system perform consistently over time. The dry pleated filter is a practical choice too: unlike oiled filters, it requires no special maintenance products and is simple to clean.

Fitment: This kit is designed specifically for the 2017 Honda Civic Si. Use the vehicle lookup tool on this page to confirm compatibility with your car, or check the Vehicle Fitment tab for full details.