TSP High Efficiency Downpipe Upgrade for 2016-2021 Honda Civic 1.5T civic si your tuner can now tune

your tuner can now tune your car faster and more accurately

5" 400 cell count EPA compliant GESI G-Sport catalytic converter

Saturated / High Impedance Ball & Seat Injectors

we saw horsepower gains of around 9hp

TSP High Efficiency Downpipe Upgrade for 2016-2021 Honda Civic 1.5T civic si your tuner can now tuneFits all 2016 2021 Honda Civic 1. 5T models Fits all variant models including RHD, international models, Etc. Notes: No ECU calibration or tune is required, use of this downpipe will NOT result in a check engine light! This downpipe utilizes a 4. 5" 400 cell count EPA compliant GESI G Sport catalytic converter, for use up to 850hp. This downpipe is compatible with factory and or most aftermarket front pipes, no adapter necessary. Technical Notes: