Hondata

A more restrictive filter was a bad idea.. I think the factory airbox versus Mishimoto "stock equivalent" box work as intended.

I will try cleaning the MAF and putting a slightly more restrictive filter on. I doubt I'll go through with installing the factory box though.

I have not changed the clutch or the flywheel and yes the intake is CARB approved. The trims seem identical tuned/ stock with the intake.

Indeed, I have the CARB FP, not the race one.

I recently tuned my 2018 honda civic sport (manual transmission) with the CARB +6psi calibration. Long story short I detuned the car because there were misfires showing up during gear shifts and sometimes while cruising in 3rd gear. I thought it was just a general civic thing but it does not misfire ...