How much horsepower does a supercharger add to grand am gt?
There are a few different variations of the Grand Am GT, as well as various different supercharger setups that one could purchase and install aftermarket. Therefore, it's quite challenging to state exactly how much horsepower one "typically" adds through installation of a supercharger. However, according to an enthusiast forum: a stock Grand Am GT is rated at somewhere between 166 to 270 BHP, whereas one fitted with a high-quality supercharger system may put out upwards of 800 BHP if other supporting performance modifications have been performed as well (such as intercooler, enhanced fuel pumps, cold air intake, etc.).