Dear Rao,
Thanks for feedback. Chassis of Civic are not that strong. Strut bars are really needed in this particular model. Other than stiffness & drive stability, these bars also give adequate safety in case of some forward, rear or side hit. I am not planning for swap, I am planning for complete dent/paint and uplift of my car. During that repair work, I intend to go for installation of 03 or 04 strut bars.
Whereas mileage on Coure Carb is concerned, I have checked it number of times. I frequently travel on long routes. After having this modification, my fuel consumption has reduced significantly. With the original carb, I was getting around 10 KM/L on long routes, but now it is very economical.