so i was thinking the dan the fastman throttle bodys are just stock ones pepole have sent him for there core charge and he machened them out from 48mm to 50 mm (i have a 5.2)then he resells them so would it be the same if i just got mine machined out to 50 mm and skiped the middle man or duz he do more than that?

 

Here's the info: http://www.thefastman.com/ThrottleBodies.asp

Here's another guy that does TBs, and does EXCELLENT work. I wish he would've finished his V10 prototype : http://www.fbthrottlebodies.com/

 

ok that makes more sence now i thought it was just bored out but there is more to it than that

 

so i have the 5.2L whitch is the better 50mm or 52mm on that 2nd link it says there both for the 5.2 or 5.9 the only diff is the 50mm is listed for the 3.9L as well

 

With the 5.2 you want the 50mm. I'm really happy with mine.