I recently purchased an 05 s281sc and love the looks but felt I wanted more power. So I purchased a 550 hp upgrade from JDM and overall I'm pleased with it. The car dynoed at 460 rwhp. The tune from JDM is a good consevatve tune. If I want to make more power I could get a custom tune but Im satisfied with this one. My parts consist of a 3.2 inch pulley, gt 500 fuel pump, 39 lb injectors, jdm CAI, extreme inlet tube, colder plugs, jdm tune, Bassani catted x pipe, extreme control arms and panhard bar.
The car pulls alot harder than stock!!!!!