I would purchase a modified car from this forum because most of the reliability stuff is done and the car has more then likely been treated well and tuned properly. It gets very costly when You start to get into the big HP and why not let someone else put in a new engine and go through the hassle and expense. Check the for sale section.

I would put on Your list a ECU, boost gauge for sure.

 

cool thanks for the link. also, its a good idea but i like buying cars stock and building them up myself so i can say i did the mods. not bought it like that.