i dont agree with the comment about the qr25de(spec-v) motor not having potential...... its not because i have a spec-v but because ive seen it. theres a 400 whp spec-v which has been running for a few months now with no problem and i have to say..... that thing is a beast........ it takes some pistons, rods,sleeves and a few other things but it can ge up there ......... read about it guys..... go to b15sentra.net or www.thevboard.com if u want to learn a bit more about it......... im gonna be doing about 255 - 260 whp wih my turbo kit because i got jwt cams..... ill keep u guys posted