And let me just say this...
Many if not most of the folks on these quad boards are young kids. The last thing they need to here about is some magic radiator that gives 'em 4hp more. They work hard for their dough and dropping several thousand for their toys or making payments, etc. is a big deal.
If your "friend" wants to build/sell rads, great. I'm sure many folks will need another somewhere along the line, but don't lurk around hyping the thing as an hp increase device.
It's a well known fact that heat will rob HP, but if a $460.00 rad were to give back 4hp, it would be a very popular mod and one of the first purchases someone would make.
And lastly, I see you PM'd me - save it bro. I'm say'n what I've got to say in front of everyone. I'm a big boy and don't need to take it "outside" with you. I'm a decent guy till someone starts spewing crap from their piehole. I'm so outwardly anti-bullshit many don't like me, but you've got to admire my honesty. Actually, you don't have to. I don't really care.