All of kevin's original dyno tests can be found --->
HERE
fwiw the car that was put on the dyno had a custom exhaust from manifold back and a very mild cam upgrade. The 19awhp gain WAS done only by the intake, and not a culmination of all the modifications at once, as the upgrades were installed by the previous owner (As stated many times in kevin's original testing and our for sale threads)
on a bone stock car, it wont have quite the same impact, as the intake isn't really a bottleneck untill the exhaust is freed up a bit. but if your planning even very minor mods, it certianly is worth doing. If you're planning on going with lan's sc set up, it'll benifit GREATLY since the intake needs to be able to feed that blower.