hi i am thinking about adding a lpg system on my subaru impreza what should i watch out for or should i not do it thanks

I wouldn't do it myself. And for the same reason I can't help you with your question, and why I would not do it is I don't know much about having it done. other then it's cheaper to run

But your's is a sport's so can't see there being any problem's but you will lose some BHP I believe

not sure how hard the valve seats are, but there was once a list of car models that suffered with burn out valve seats due to LPG the most.. I will try and find it

that would be grate if you could find that out for me

Welcome to the Subaru Owners Club! :D

How did you get on with the conversion, we are thinking of converting our Imprezza ?

By the looks of it a few people have done this already. I still wouldn't myself but that's me. Apparently you can have brass straws fitted in to the inlet manifold to deliver the gas direct to the valves, that helps keep the power there. But I would always recommend going to company who knows there stuff. And look to see where you can fill up. My local fill up place is miles away :)