Not a bad idea ! I might give it a try, otherwise replacing a silencer box option is always open, should give it a try !
Btw i m getting approx 11 km/liter in city, have just check again, last time i check it was somewhere around 9km/L, may be bad quality of fuel or some other reasons, wat u say should i go for CAT or wait !
I used to get around 14 - 15 km/liter when odo was at 40k , after 55k its just like that .....
Hash brother suggested to get CAT removed before installing cng .... also planning to install cng, not sure at the moment !
Heard petrol coming down 5 rs and cng going up to 70 rs / kg in near future ! dont know how authentic is this news is but better wait for a while i think .......