Saleen Focus N2O / S121

Tuner Saleen modified the Mark II USA Focus into the S121 and N2O performance cars. The S121 includes a 150 hp (112 kW) Duratec 2.0l I4 engine with improved suspension, custom body kit, custom graphics, tire and wheel package, customized interior components, and optional upgraded brakes. The performance boost to the factory Duratec 2.0l I4 engine was achieved by replaceing the factory paper air filter with a more freely flowing reuseable air cleaner and by replacing the restrictive factory exhaust with a cat back exhaust system. The N20 offers the same base engine and other improvements along with a factory installed nitrous oxide system that offers a 75 hp boost bringing the N2O to 225 hp The S121/N2O are sold as new at many Ford dealers. There were 200 S121/N2O's produced by Saleen in 2005.