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The Tri-Y header delivers low-to-mid end power while utilizing a two-piece design
This means that for most basic part configurations
All tunes require a professional
you can adjust the knob position
2016-2021 Honda Civic Non-Si 1.5T Short Ram Air Intake System Bore Size:Big Bore The Tri-Y header delivers low-to-midFITS: 10th Gen honda Civic 1. 5T (non Si) THIS IS A SPECIAL ORDER ITEM INSTALLATION: PDF 2016 2021 Honda Civic 1. 5T Short Ram Intake System Install Instructions (Standard Bore) PDF 2016 2021 Honda Civic 1. 5T Short Ram Intake System Install Instructions (Big Bore) Important Notes: NO ECU CALIBRATION REQUIRED FOR STANDARD BORE MAF HOUSING BIG BORE MAF SPECIFIC ECU CALIBRATION IS REQUIRED FOR BIG BORE MAF HOUSING BIG BORE MAF BASEMAP CALIBRATIONS