The World’s Most Popular Nitrous Oxide System! The NOS Cheater system is designed for use on 350 CID or larger, carbureted engines. It uses large nitrous and fuel solenoids and can be adjusted to any desired power level from 150 to 250 horsepower, in a matter of seconds. Cheater systems are easy to install and utilize a 1/2” thick injector plate which fits between the carburetor and intake manifold to provide ample hood clearance.