my uncle just bought a new mustang gt and he wanted the v8 manual and they didnt have the best system u could get on it in the lot so he just went with the basic shaker 500... 500 watts with 10" subs in the doors...shaker 1000 comes with another set of 10"s in the trunk and another 500 watts i wasnt aware of stock systems like this...
Yeah ford actually started it in the rangers. in I think 02 or 03 they removed both back seats and replaced them with 10's and a 500 watt amp. I thought it sounded nice, for a stock system. pontiac I know has been putting amps in cars for years.