i have honda amaze with same brio engine L12b . i have installed a small conical pipercross air filter and a nitto axle back exhaust. lately i have noticed that whenever i drive my car with A/C on , in third gear my car gives weird knocks / minor jerks . this is only when rpms are below 2500 . once the rpm goes above 2500 this problem goes away.
what you guys think ? is it due to the air filter?