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03-06-2010, 10:49 PM
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#1
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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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.
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Quote:
Originally Posted by SRGN
I never pulled into the staging beams at the track and saw a dyno in the other lane.
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South Jersey Racecraft
Last edited by S.J.SLEEPER; 03-07-2010 at 08:14 AM.
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03-06-2010, 11:42 PM
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#2
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
Posts: 4,620
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98's were stainless...
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1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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03-07-2010, 06:37 AM
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#3
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12 Second Club
Join Date: Aug 2004
Posts: 2,923
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my 98 had two cats before i went long tubes years ago.
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2016 Lamborghini Huracan LP610-4
2012 Lamborghini Gallardo LP560-4 Spyder
2013 Nissan GT-R Black Edition
1999 Trans Am WS6
2000 Trans Am WS6
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03-07-2010, 08:17 AM
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#4
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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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)
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Quote:
Originally Posted by SRGN
I never pulled into the staging beams at the track and saw a dyno in the other lane.
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South Jersey Racecraft
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03-07-2010, 09:38 AM
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#5
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,936
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Manifolds for turbos are ftl. Make your own headers Curt.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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03-07-2010, 04:13 PM
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#6
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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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.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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03-07-2010, 04:34 PM
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#7
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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Quote:
Originally Posted by LTs1ow
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.

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Quote:
Originally Posted by JL8Jeff
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.
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wher you located @? I need them to copy the both flanges & dimensions. I can give them back.
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Quote:
Originally Posted by SRGN
I never pulled into the staging beams at the track and saw a dyno in the other lane.
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South Jersey Racecraft
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03-07-2010, 04:58 PM
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#8
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Join Date: Jun 2006
Location: Sayreville, NJ
Posts: 801
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kurt i have a set of 98 edelbrock shorty headers if you want them.
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03-08-2010, 07:24 AM
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#9
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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Quote:
Originally Posted by S.J.SLEEPER
wher you located @? I need them to copy the both flanges & dimensions. I can give them back.
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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.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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03-09-2010, 08:37 AM
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#10
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Join Date: Apr 2007
Posts: 326
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Quote:
Originally Posted by SamhainZ28
kurt i have a set of 98 edelbrock shorty headers if you want them.
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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.
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92 TY 500RWHP 93oct. Safe Street Tune
87 GN Low Mile 10.4 @ 128
11 CTS V 12.0 @ 116 stock. mow modded
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03-09-2010, 07:08 PM
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#11
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11 Second Club / I <3 LT1s
Join Date: May 2008
Location: Troy, Mi
Posts: 2,642
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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.
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Vinnie -
00 SS A4- LQ9/LS3/Stalled/3.42s 1.48/11.10/121 mph<-6spd swap in progress.
13 Silverado Z71- Sold 11/16
99 Z28 M6- -H/C/9in - sold 1/13
99 Silverado Z71- The DD - Sold 7/13
03 CBR 600RR - Sold 8/13
Last edited by NJ346; 03-09-2010 at 07:08 PM.
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