silverstang1996

alright well i know well of the famous PI head swap for us 96-98 guys, adding about 40rwhp or so, well i was bored just looking at the specs of ford racings SVO 4.6 heads, saying how they add 35hp over production sohc heads. how can these SVO heads just add 35 hp when a pi swap is adding like 40hp, for half the price? both SVO heads cost like 2000, and all the stuff needed for a pi swap is like around $1000 i believe...any help here?
the link to the svo heads is this if anyone may need additional info on em

http://www.fordracingparts.com/parts...tKeyField=2239

silverstang1996

bump

rbstang

Pi swap bumps up the compression.... i dont know anymore...