yes, and if you want to save 5,00,000/- for 5-years (driving 3000km/month) than use CNG instead, driving EFI with CNG dosen't kill performance, coz i've experienced it with CNG, 140km/hr speed is possible using CNG (advancer and emulator is a must).
don't worry abt performance.
QQ is a powerful engine based machine, go ahead after completing it's running.