listen bro.....i drive a lumina ss'08 .....but trust me u cant do anything to it here..you are not allowed to put any exhausts or anything to increase engine performance. its banned by the police..u need permission from them..and i dont think they give. however, jeep , ford and chrysler owners can modify their cars from the dealership itself with permission from police. unfortunately, chevrolet dealers in qatar dont give anything.

i knew a friend who had exhausts on his lumina ss..the police impounded his car in jail for a month and fined him 6000 riyals......however , if u still want to put exhaust system..go to city car accessories in al markhiya..next to star of india. They are the official dealers of BORLA performance parts.
i wish some day chevrolet dealership comes up with performance accessories like the other american dealerships here.