Sorry, definitely one for Dai. The other place to ask is the UK LPG forum. Me? I like the contrast, I'm often looking over the Indian gas sites and such things simply don't get asked, It would seem the Maruti exhaust is unique, it will never get hot. Therefore, if you like, you can run you pipes down the exhaust. Even use the exhaust as trunking. Suzuki made them like that, hence these questions are not required
So be corrected? You? me? We worry too much.