20-25 as a rule of thumb. More with good heads.
10hp
yes
69
bout 10 to 25. depending on what size of motor
There are many easy ways to add horsepower like.... Air intake system headers performance chips turbos basically whatever you can afford cause parts tend to be pricey
adding headers will allow engine to breath better and boost up horsepower but not by much, headers also make you vehicle louder with pipes.
what year
Maybe 10
if you can find the hp. of the eng., you can add between 12-20 more hp. for the headers.
The 2000 Ford Mustang GT was rated at 260-horsepower
Not enough to even notice.
Not much, I wouldnt exspect it to b the diffrence from burnin rubber or not, maybe 5 - 10