Form other posts, here and on other boards, the conventional wisdom is that heatsoak doesn't affect the air going through the intake tube. The velocity is such that the air doesn't have time to heat up from the heat stored in the plastic/metal.
There was a coupon code for DashHawks. PM Vector, call them, or email through their site. I paid $250 and I think they might have been cheaper since then.
It's worth the money.