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

Fits all 2017-2021 Civic Si 1.5T
Fits Honda Sensing Package
Canadian Models Require USDM Windshield Washer Reservoir Conversion (Supplied by Teknotik)
Important Notes:
• NO CALIBRATION REQUIRED FOR SANDARD BORE MAF HOUSING
• 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 Housing and is available with two different MAF housing choices; a Standard Bore housing and a Big Bore housing. Both housings utilizes the factory MAF sensor, but feature two different diameters and profiles. As mentioned above, the Standard Bore housing is designed to provide factory-spec fuel trims WITHOUT any tuning whatsoever. The Big Bore housing allows a 50% larger volume of air in comparison to the Standard Bore housing, which is why a tune IS required. This larger volume of airflow reduces pumping loss and creates an unrestricted air path to feed the MAF housing with ambient temperature air.
Customers can switch between MAF housings without having to buy another intake system by purchasing our MAF Housing Conversion Kit
Customers can convert to a Short Ram Intake with our Short Ram Intake Conversion Kit
Performance Gains:
• 15 horsepower and 12 ft/lb torque gains in comparison to stock with Standard Bore MAF housing WITHOUT TUNE -
• 20 horsepower and 15 ft/lb torque gains in comparison to stock with Big Bore MAF housing WITH Big Bore MAF basemap calibration on Hondata and/or KTuner –
• Larger gains to be seen at higher power levels with custom tuning

Kit Includes:
• Billet Aluminum MAF Housing (Anodized Black)
• PRL Motorsports High Flow Oiled Cone Air Filter
• (1) 4-Ply Upper Silicone Intake Hose (Big Bore or Standard Bore)
• (1) 6-Ply Lower Silicone Intake Hose
• HDPE Rotomolded Lower Intake Tube
• (4) 304 Stainless Steel Worm Clamps
• Stainless Steel Mounting Brackets
• Stainless Steel Hardware
SILICONE IS ONLY AVAILABLE IN BLACK – UPPER HOSE IS DIFFERENT THAN OUR “STAGE 1” SILICONE