They have pressurized system operated by catalytic converter cleaning machine, they just opened my O2 sensor installed on catalytic, through that they injected special chemical and all carbon was drained through exhaust, my acceleration told me the difference right after i took test drive, and yes they also cleaned my Fuel Injectors through machine specially designed for Fuel Injectors Cleaning, they charged me 3500 as per package mentioned on their Facebook page ,for people asking me aboit their contact plz search Autotechdha on Facebook, they are located in DHA phase 2 ext.
