what are PI heads.

[romgolferman]

i was thinking about buying a set. i have a stock 2000gt. are these the same heads i already have or are they the 4 valve. they came off of a lightning. it also has the lightning cams. are they any good.

 

[notoriouspig]

i may get corrected...PI means performance improvement heads... they are stock on 99-04's, but are an upgrade for 96-98's...that is my understanding...

 

[SaleenGT2001]

i may get corrected...PI means performance improvement heads... they are stock on 99-04's, but are an upgrade for 96-98's...that is my understanding...

correct

 

[Rougestang]

The lighting is a 5.4L modular motor. the heads won't fit on a 4.6L. notoriouspig was right about what PI heads are, but if it's from a lightning it won't work for you. Since you already have the PI heads on your stock 2000gt, the only way to make the flow better is either 1. port and polish your heads, 2. get an aftermarket set of them, or 3. add an air induction(i.e. turbo or supercharge it) Or you could get different cams like crower, eddelbrock, lunati... etc...etc... there is alot to take in when it comes to modifying your car, and can be expensive.

 

[bdcardinal]

the 5.4 and 4.6 use the same heads, its called modular for a reason. there are differences in the valve covers and the cam gear connections between Windsor and Romeo.

 

[Scorcher2005]

The 4v heads will not bolt onto your 2v motor without expensive modification. Also, you already have PI heads.