Hey buddy I orginally bought piping & cooler off someone else in this forum, however the piping and the cooler do not match up properly and at the time i had fitted the new turbo and it was booked in for a tune, so i had to have an intercooler on it. As this cooler & piping did not match up i was forced to buy a new HKS cooler kit from UPI on the spot so now i need to sell the cooler & piping that i bought.. but now sell them seperately as they do not match up.. the piping is sold so now just the R34 GTR cooler, this can be polished up also for around $30.
Power wise, R34 coolers are good for around 300rwkw..
From stock GTSt if you had say exhaust/filters/boost 10psi id say you would make around 165-170rwkw, with the cooler you would easily increase up to 180-190 and be able to run 12-13psi more safely
Thanks