depends on a tune...and other mods done to it... i'd say 400 with a really safe street tune...440 on a good street/race tune...and over 500rwhp on a race tune...hope that helps...
The 1998 Ford Mustang 3.8L V6 has 150HP the 4.6L V8 has 225HP
305 BHP
The 2004 Ford Cobra has 390 horsepower 4.6L DOHC V-8
320 Horsepower
It has about 150 horsepower at 4000 rpm and 215 ft/pounds at 2750 rpm, respectively.