wondering about swapping heads

stangman96 · 02-04-2002, 08:17 PM

i heard that if i put heads from a newer mustang, like 99 and up on an older 4.6, it is good for an 80 horse increase, of course using a new intake as well and gaskets...... anyone hear about this and is it a direct bolt on without any extra parts or modifications??

tireburner163 · 02-04-2002, 10:08 PM

Yes you can swap the heads with a few minor modifications. Try posting this in Modular Madness.

I don't know if it'll be quite 80hp, but it'll be a lot. Also if you plan to use nitrous or a blower, I would reconsider. Due to different piston designs(96-98 had flat tops, 99+ have dished) you will get about 11:1 compression with 99+ heads on a 96-98 motor.

02-04-2002, 08:17 PM	#1
stangman96 Ford Dealer Mechanic Join Date: Feb 2002 Location: San Antonio Teaxs Posts: 31	wondering about swapping heads i heard that if i put heads from a newer mustang, like 99 and up on an older 4.6, it is good for an 80 horse increase, of course using a new intake as well and gaskets...... anyone hear about this and is it a direct bolt on without any extra parts or modifications??

02-04-2002, 10:08 PM	#2
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Yes you can swap the heads with a few minor modifications. Try posting this in Modular Madness. I don't know if it'll be quite 80hp, but it'll be a lot. Also if you plan to use nitrous or a blower, I would reconsider. Due to different piston designs(96-98 had flat tops, 99+ have dished) you will get about 11:1 compression with 99+ heads on a 96-98 motor. __________________ 1987 Buick T-type 1998 HD Electra Elide

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