4.6andSlicks said:I see it often.
4.6andSlicks said:I see it often.
JRS02GT said:It stands for "performance improved". 99 & up GT's have the PI parts; intake manifold, heads, & cams. The PI motors breathe better than the non PI's. Thus, more power.
CobraRed_96_GT said:i was gunna link the acronym sticky but its not on there, wtf? lol
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