i have bought splitfire tp522d for my alto vxr heard they are good for pick and performance.........i wana inquire when u put these plugs do u adjust the gap or we just put the plug as it is..........as i put the plug as it is but its going good later but doesnot give good pick in the first gear and at the start of first and second gear and the car performance have suffered but it is not that case on cng its performance has increased on cng.............so shud i adjust the gap or i m getting some other problem............if yes than plz also quote it.............or it is due to timing or mixture setting?.waiting for info replies as i might get it tuned depending on ur replies