This is the same strut tower brace that comes standard on the Shelby GT500KR. It's single large diameter, oval tube construction makes it the strongest strut tower brace you can buy.
Ford Racing M-20201-C Strut Tower Brace
Fits 2007-2009, Ford Mustang SVT
and 2005-2010, Ford Mustang GT without engine dress-up cover
and 2011 Ford Mustang GT with engine dress-up cover