lss1

iTrader: (25)

I have been doing alot of research and have an LS1 that I am swapping into my MonteCarlo SS. I have a question on 98 year cylinder heads. I know 97 and 98 heads are perimiter bolt heads but is that the only diffrence? It seems that the 97-98 year heads always sell for dirt cheap compared to 99-later. I need heads for the motor and an thinking of picking some of these heads up just to get the car together. I will be upgrading the motor in about a year or two anyway. Any input is appreciated.

Marco

19SS98

iTrader: (-1)

from wat i know the 98 heads do not flow too good. the 241 or 243 on the 99 on up are the better ones. cause i know what you mean about the 98s goin cheaper. i have a buddy sellin some for like 100.00

Sideways240sx

iTrader: (22)

they do not flow as good as the later heads, but up against ls1 heads they wont be that big of a difference in hp wise. If there in decent shape, and cheap enough and you plan on upgrading soon, why not save yourself a little bit of money now.

Chris

orangeapeel

iTrader: (18)

Moving to internal

AutomagicLS1

iTrader: (18)

Youll have to run those damn graphite gaskets instead of the mls gaskets with 98 heads they have that notch on the deck of the heads

Gunnar@Patriot

iTrader: (20)

If you are going to swap the heads, spend the extra and go with a set of 243 castings. You will see better power gians than simply going to a later set of LS1 heads. We have some great pricing on new 243's. Give us a call if you have any questions.