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Message: <blockquote data-quote="JeremyAlan" data-source="post: 611971" data-attributes="member: 8259">Better breakdown:95 - Death of the 5.Slow96-98 GT - Non-PI heads 220-ish hp99-04 GT - PI(Performance improved) heads 280-ish hp05+ GT - 3v per cylinder heads with VVT (variable valve timing) 300-315 hp96-98 Cobra - 4v per cylinder "B" heads - split port and complicated setup99/01 Cobra - 4v per cylinder "C" heads - more simple design restoring low end torque lost in the B head03/04 cobra - 4v per cylinder "E" heads - since the car is boosted to begin with... best responding heads to boostAll the blocks are the same in the above examples. Except the GT has an iron block and the Cobra's have aluminum blocks. also as a side note... the 1996-1997.5 cobras had a teskid block which is a special type of aluminum that they used on Ferrari's or something like thatPS- if i'm being mis-lead on anything someone feel free to correct me.</blockquote>