i knew it ;o)
all the big result are from JE (sikky)
if you want my 2 cent the real gain from those headers are exactly around 20-25hp max
and i am welling to pay someone to come here in canada at sea level on a mustang dyno ... 1 pull no headers second pull with headers
i am 100% sure the result will be around 20-25 hp max
if the result is way over like sikky say i pay the headers to the winner
+ installation
all the big result are from JE (sikky)
if you want my 2 cent the real gain from those headers are exactly around 20-25hp max
and i am welling to pay someone to come here in canada at sea level on a mustang dyno ... 1 pull no headers second pull with headers
i am 100% sure the result will be around 20-25 hp max
if the result is way over like sikky say i pay the headers to the winner
+ installation