The peeps at Project 6GR are much obliged to improve the S650 Mustang ... of the S550 Shelby GT350R. Said wheels aren’t cheap, though. $1,960 is the starting price listed on the aftermarket ...

The classic DNA is still with the S550, however, including the highly capable Coyote 5.0-liter V-8 and the front-engine, rear-wheel ... S550 performance variants as the be-all-end-all Mustang ...

From: body kits; exhaust; superchargers; wheels; cold air intakes; performance ... the Roush Mustang was born. Built upon that history of research and development, the outgoing S550 generation ...