i haven't tried it.. dave says no...... as his stock radiator cooled better than a just crap one. Also the top bit where the cap goes on is only pressed in rather than welded in, creating another weak point.
the pwr ones are 740, and i can't justify 740 on a radiator, especially when I've got so much other shit to fix asap.
so.. I'm thinking ... just jap, get the top bit welded and away i go.. that'll be $430... as you know what? I'm not running a 400kw gtr like dave.. and I'm sure the gtr radiators have much much better cooling qualities than the s13 ones lol.