This Short Ram Air Intake System is a perfect fit for all 2017 - 2021 Civic Si 1.5T models, including most variants like 6MT, CVT, RHD, and international models. It offers two installation guides: one for street use and one for racing.
Important Notes: The street MAF housing doesn't need calibration, but the race MAF housing requires race - specific calibration. Race MAF basemap calibrations are available in both Hondata and KTuner. You can also use Two Step Performance 'TSP' and Phearable calibrations by selecting the 'Race MAF' option.
If you're looking for an intake system for your 1.5L Turbo Civic, our Cobra Cold Air Intake System is a top recommendation. But if you don't want a CAI, this Short Ram Intake System is a great alternative. The CNC machined billet aluminum MAF housing is designed to provide factory - spec fuel trims for the best drivability and performance. It uses a 4 - inch air filter and comes with two MAF housing choices: street and race. Both use the factory MAF sensor but have different diameters and profiles. The street housing gives factory - spec fuel trims without any tuning, while the race housing allows 50% more air and needs tuning. This larger airflow reduces pumping loss and provides an unrestricted air path.
You can switch between MAF housings using our MAF Housing Conversion Kit and convert to a Cold Air Intake with our Cold Air Intake Conversion Kit.
Performance Gains: You can get 15 horsepower and 12 ft/lb torque gains compared to stock with the street MAF housing without tuning. With the race MAF housing and Race MAF basemap calibration on Hondata and/or KTuner, you'll see 20 horsepower and 15 ft/lb torque gains. Custom tuning can bring even larger gains at higher power levels. Note that short ram intakes are sensitive to heat - soak in this chassis, so performance may decrease as the engine and intake heat up. We've also provided graphs of long - term and short - term fuel trims to show the consistency of our product with different setups.
Using this Short Ram Air Intake System is straightforward. First, choose the right installation guide based on whether you'll be using it on the street or for racing. If you pick the street MAF housing, you're good to go without any calibration. But if you opt for the race MAF housing, make sure to do the race - specific calibration using Hondata or KTuner.
When it comes to maintenance, regularly check the 4 - inch air filter. If it's dirty, clean or replace it according to the manufacturer's instructions. Since short ram intakes are sensitive to heat - soak in this chassis, try to avoid long - term high - stress driving that could cause excessive heating.
If you want to switch between the street and race MAF housings, just use our MAF Housing Conversion Kit. And if you decide to convert to a Cold Air Intake later, our Cold Air Intake Conversion Kit will make the process easy. Enjoy the enhanced performance of your Honda Civic Si 1.5T with this intake system!
