i bought an 01 gtp recently for a real good price. The car runs fantastic and haven't had any problems out of it in 5k miles that I've had it. It seems as if it was somebody's project at one time as I can see it has headers, bad a$$ exhaust, injectors, pcm, fuel rail, just an open come filter ATM soon to be fixed as it also has ram air hood. interior looks to be redone, underglows. the part that puzzles me is the 1/2 in diameter nonpressure hose coming from behind radiator that goes to nothing also the other two black 1/2"-3/4" pressure hoses that come from behind aren't connected at all with a nipple looking fitting. Any ideas? Have owned a couple gps but not one like this and been trying to figure out what is missing in it. When I flip a switch installed on dash coolant will spray out one of the black hoses. Some sort of intercooler ? Don't have a clue.