That is true that the late-model V8 Explorers have GT-40X heads. I think they will match up fine, but I believe they require different headers. Not sure, though. The GT-40X heads flow alot better than the stock 5.0 Stang heads. Or so I've heard anyway.93lxnotchswap said:i know nothing about ford heads except that im doing a motor swap and i have stock 86 5.0 heads and what a buddy told me are 96 or so explorer heads that are supposed to be iron gt-40s'? is this correct? they have heart shaped combustion chambers. what is the diff. between my two heads?
:sterb: That's what I meant. Brain fart. (A $500 one, at that!)FoxChassis said:GT-40X? Those are aluminum and certainly were not on Explorer/Mountaineer engines as OE. You're thinking of GT-40P heads.
GT-40 heads = '93-'95 SVT Mustang Cobra, '93-'95 SVT F-150 Lightning, '96-early '97 Explorer, early '97 Mountaineer, and H.O. (285 and 295 HP 5.8L) marine engines
GT-40P heads = late '97-'01 Explorer/Mountaineer engines
GT-40 "X" "Y" and "Z" heads were aftermarket (Ford Motorsport/Ford Racing) aluminum castings.