llooggaann

What is this exactly?
correct me if im wrong but is it, taking the heads, intake, and cams from a 99-04 mustang and putting it in a mustang of earlier years such as my 96?

if so , I already have CAI , and i planned on getting stage II cams from American muscle in the near future. But i wanted to do a PI swap first, because everyone says that is the best thing to do in the beginning? if i were to do a PI swap all i would need was the heads right? and then i can just buy the cams and install those with the heads?

I'm not that knowledgeable on the subject, any advice will help, especially on what to do before/after this, if this is even a wise choice

SXGT

PI is the heads and the intake manifold. see if you can find used ones from a salvage yard on a rear end collision of a low mile 04.

the PI swap should put you at 270hp i think. If you wanted to you could get better heads than the 99-04 mustang.

PositiveKarma

Don't forget about the Cams too.

If you're interested, read up on this guide:

http://www.stangnet.com/mustang-foru...ite-up.717166/

school boy

op, like mentioned earlier the pi swap is just using the complete heads/cams and intake manifold on the 96-98 gt's. if you use the factory pi cams and are buying the heads already assembled, then you can get away with out degreeing the cams and just bolt the heads on. if you decide to buy cams then you will have to degree them! choosing a cam is another thing you need to decide on. bigger isnt always better. going too big and valve notches are needed or the cam needs to be retarded which is bad because it will yeild bad low end power. buying a smaller cam that will yeild better power curves through the whole rpm range is what you will enjoy the most. here is a pi swap write up and my build thread which will show you a little on valve notches (bugdet ones anyway) and degreeing in cams.
http://www.allfordmustangs.com/forum...ustang-gt.html
https://mustangforums.com/forum/4-6l...ine-build.html

bigdaddytwingirls

I just recently purchased a set of pi heads and pi intake. The cams were removed for storing purposes. When installing the parts on my 98 gt, will the cams need to be degreed? The only mods done thus far is cats removed, flowmaster exhaust into turn downs before the axle. Any advice for the most power improvement for my money?

boduke0220

You have the right idea OP, PI swap with stage 2 cams would make great power. just make sure you get the heater tube that goes under the intake mani. i think MHS sells a nice swap kit

kugzgt

+1 I ran into that problem, I ended up ordering mine from the dealership.

read this and you will see..
https://mustangforums.com/forum/4-6l...swap-asap.html

school boy

you could get by with factory cams not degreeing them but i would personally. it will get the most hp out of them. if the engine will be out, then i definately would. easy to perform then. there are companies out there that perform cam degreeing services too if you dont feel comfy doing it yourself

bigdaddytwingirls

The guy installing them is going to degree them for me. The motor is not going to be out.

EddyG

I have the PI swap with stage 1 cams an full bolt ons with 4:10 gears.minus headers and made 281rwhp and 318rwtq. And ran a 13.23 at 107 in the 1/4 with street tires. I think I could get into 12's with slicks. Definitely worth it.