You are confused what cars are in what class.
Mustang = muscle car, period.
Porsche 911= sport car, period.
M3= luxury sedan/coupe or you could go as far as saying luxury sport.
These 3 cars are in NO WAY related and all 3 of these cars were built with different purposes in mind.
4 tires, 4 rims, motor, tranny. all cars related
2014 Black 3.7 6M. 20 inch black bullets, Pypes Axle back, matte black super snake stripes, next up JLT intake.
2011 Mustang 5.0 Race Red. gone and was sick
2011 Mustang 3.7, gone sold 3 times since, that I know of.