This is all 2.75" exhaust setup from stock exhaust manifold back.
Ford H-Pipe with Cats part no DR3Z-5F250-A 2013-2014 $900
Lethal Performance 2-3/4" T304 Stainless GEN2 Over Axle Pipes (2011-2014 Mustang GT / 2012-2013 Boss 302 / 2011-2014 Shelby GT500) $250.00
BORLA part no 11798 S-Type axle back. $725.00
Ford H-Pipe with Cats part no DR3Z-5F250-A 2013-2014 $900
Lethal Performance 2-3/4" T304 Stainless GEN2 Over Axle Pipes (2011-2014 Mustang GT / 2012-2013 Boss 302 / 2011-2014 Shelby GT500) $250.00
BORLA part no 11798 S-Type axle back. $725.00