rear exhaust?

heey im new to rc(well, nitro rc then). i have had about then electrics, and now i wanna move over to nitro. i saw plnety of rear exhaust for nitro's, but they where for nitro boats. is it possible to mount one on it or make one custom? or are they available for nitro cars as well? if so, on which scale( 1:6, 1:8 1:10 or micro)are they then?

if this helps, i want a touring car first, i think an hpi rtr kit. if thats get bored maybe i change for a savage, depending for the price.(im 15, thats why)

i need to save up for one first, i need about $150 till i can get one, and i cant go for work right now because were going to move to another country(uk, dont know which place yet)

thanks in advance

I don'r know of any rear exhaust kits. I've only seen side exhaust but it may be possible to run a flexible tube from the muffler to out the back depending on the amount of space under the body.