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View Full Version : general question....Difference between 98 /99/00-01/02 manifolds?

S.J.SLEEPER
03-06-2010, 10:49 PM
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.
NJ Torque
03-06-2010, 11:42 PM
98's were stainless...
GrandmasterCow
03-07-2010, 06:37 AM
my 98 had two cats before i went long tubes years ago.
S.J.SLEEPER
03-07-2010, 08:17 AM
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)
LTb1ow
03-07-2010, 09:38 AM
Manifolds for turbos are ftl. Make your own headers Curt.

:)
JL8Jeff
03-07-2010, 04:13 PM
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.
S.J.SLEEPER
03-07-2010, 04:34 PM
Manifolds for turbos are ftl. Make your own headers Curt.

I'm going too, I want the stock manifold to copy the dimensions. Gonna make the header with 2" tubing.
:)

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.
SamhainZ28
03-07-2010, 04:58 PM
kurt i have a set of 98 edelbrock shorty headers if you want them.
JL8Jeff
03-08-2010, 07:24 AM
wher you located @? I need them to copy the both flanges & dimensions. I can give them back.

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.
Raist103
03-09-2010, 08:37 AM
kurt i have a set of 98 edelbrock shorty headers if you want them.

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.
NJ346
03-09-2010, 07:08 PM
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.