thirdgenbird

ive seen 3 or 4 NA head casting numbers. are these all interchangeable? is any one more desirable than another?

V2Rocket

theyre all essentially identical, excepting for the 89...

thirdgenbird

which has the cooling passages like a 3.0 correct?

when i talked to Lindsey, they said the wrong head could change compression...

thirdgenbird

is interchangeable as well correct?

it just has coated exhaust ports and stiffer springs i believe...


i lost out on a remanufactured head on ebay with the same casting number as mine. i just want to get the cleanest head for the money. i dont care what it came off of unless its going to cause a performance problem. i dont need more power, i just want to keep what i had.

V2Rocket

the head for the 88 944 may be different but i cant say for sure