general question....Difference between 98 /99/00-01/02 manifolds?
 

Besides the egr provision, is there any other difference.
I now that on 01-02 had cats that unbolted unlike 98-00 that had only 1 cat that unbolted and other that was welded.

Main Question.... is the passenger manifold flange (to ypipe connection) the same size/angle in all years?

yes.........an ls1 question I don't have the answer to.

98's were stainless...

my 98 had two cats before i went long tubes years ago.

Main Question.... is the passenger manifold flange (to ypipe connection) the same size/angle in all years?

I need to know this cause I have to purchase a passenger side manifold/header, for use with my turbo piping.

if the flange angle & size is the same all years than great. if not, need to know so I can purchase the correct one for my application.(I don't have my manifolds to check this cause I threw them out afterinstalling lt's)

Manifolds for turbos are ftl. Make your own headers Curt.

:)

The 00-02 had the AIR fittings rotated 90 degrees compared to the 98-99 but that shouldn't be an issue if you're going to block them off. I have a pair of manifolds sitting around if you want them. The driver's side has a stud that broke in half but the passenger side is fine with the EGR tube still connected.

wher you located @? I need them to copy the both flanges & dimensions. I can give them back.

kurt i have a set of 98 edelbrock shorty headers if you want them.

I'm in Ewing. It takes me an hour to get to the traffic light at 539 and 72 just to give you a time reference. I can leave them on the front porch if you wanted to grab them. Just let me know and I'll shoot you my address.

if he doesnt want them how much do you want? i dont even know if they will fit my car though "88gta". i have a 98 motor but am switching to 241 heads, was just going to hope the 98 manifolds worked.

I'm up in Forked River if you want my stock 99's....

PM me if interested since I probably won't check this thread.