For supercharged or turbo applications where nitrous is not an option, Nitrous Express offers another alternative, the ''N-tercooler''. Using either N2O or CO2, this unit can reduce air inlet temperature dramatically. In a recent dyno test, a turbocharged Honda, equipped with an NX ''N-tercooler'', increased its baseline by an astounding 52 horsepower! If it makes horsepower, it must be Nitrous Express! Made in the USA.