Nitrous express just came out with a fuel rail/lower intake cooler. Intended for supercharged/turbocharged cars, instead of injecting the nitrous, it is pumped through a small tube. working similar to a purge valve, the tube allows the n2o to depressurize, causing it to boil from liquid to gas and thereby absorbing heat. Pretty neat, except its costly to fill up a n2o bottle just to cool the fuel.
