2017-2021 Honda Civic Si 1.5T Cobra Cold Air Intake System - Big Bore

Fits all 2017-2021 Honda Civic Si 1.5TFits Honda Sensing PackageCanadian Models Require USDM Windshield Washer Reservoir Conversion (Supplied by Teknotik) Not for sale in the State of California.   INSTALLATION: PDF - 2016-2021 Honda Civic 1.5T Cobra Cold Air Intake System Install Instructions (Big Bore)   Important Notes: BIG BORE MAF-SPECIFIC CALIBRATION IS REQUIRED FOR BIG BORE MAF HOUSING BIG BORE MAF BASEMAP CALIBRATIONS AVAILABLE IN BOTH HONDATA & KTUNER TWO STEP PERFORMANCE "TSP" & PHEARABLE CALIBRATIONS COMPATIBLE BY SELECTING "RACE MAF" OPTION NOT COMPATIBLE WITH FACTORY CVT COOLER (SPAIN, TURKEY, ETC)   Technical Notes: There’s a reason our Cobra Cold Air Intake Systems is a constant topic of discussion and so highly regarded. Our CNC machined billet aluminum MAF Housing was designed to provide *factory-spec fuel trims (-4% of factory STFT & LTFT) for optimal drivability and performance. The Cobra CAI utilizes a 4" volume from the air filter into the MAF Ho