The best intercooler in terms of intake temp reduction is our race core. There aren't any options out there that come close to the intake temp reduction.
http://www.vr-speed.com/vrsf-race-in...i-n20-n55.html
The logs below were taken in 75 degree temps during a 2-4 gear pull. The initial pull starts at 89 degrees and jumps down to 86 degrees by the end of the run.
Here's a 4-6 pull from 40-160 MPH. The intercooler starts @ 69 degrees and ends up at 87 degrees at the top of 6th. That's a 18 degree rise over the 3 longest gears running 20psi.
If you're looking for a smaller intercooler our HD street core is a great alternative. If you're on a budget we offer a street core that does a great job as well although it's only $130 more to jump over to the better performing HD core.