The Mishimoto Performance Air Intake replaces the restrictive factory airbox on the turbocharged 1.5L Honda Civic Si with a free-flowing, direct-fit system that is 37 percent less restrictive than stock. A steel wire reinforced silicone intake arm smooths airflow and holds intake air temperatures down better than a cast aluminum tube, while the black powder-coated steel airbox shields the high-flow filter from engine bay heat and positions it to reduce hydrolock risk. The venturi-style MAF housing straightens incoming air for a cleaner sensor signal, and the sealed box draws on the factory hood air diverter for a cooler charge. Dyno testing shows consistent gains of up to 4 whp and 4 wtq on the stock tune, and the kit bolts on with no tuning required.
| Type | Performance cold air intake, sealed airbox |
| Material | Steel wire reinforced silicone intake arm; black powder-coated steel airbox |
| Finish | Blue |
| Filter | Mishimoto high-flow air filter |
| Airflow | 37% less restrictive than stock |
| Power Gain | Up to 4 whp / 4 wtq (stock tune) |
| Tune Required | No, works with the stock tune |
| Part Number | MMAI-CIV-17SIBL |
| Warranty | Mishimoto Lifetime Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2020 | Honda | Civic | Si |
