Aside from the obvious "CNG" stickers affixed to the decklid, these cars also have different exhaust outlets than what we saw on the V6-equipped Impalas during our first drive of the sedan back in ...

save for the CNG sticker on the front. However, underneath its familiar skin, it is very different. For starters, TVS has plonked a CNG cylinder under the seat, which can hold 1.4kg (9.5 litres ...