Do LS1 intakes have no EGR???

**tnmotown** · 01-08-2008, 09:15 PM

Just curious, if the intake manifold has no EGR, does that mean its an LS6 manifold? Or is there some LS1 manifold that dont have EGR? just curious because i called a wrecking yard and they said they have manifolds that came off a 2000 or 2001 corvette. thanks for any input

**firemedic0135** · 01-08-2008, 09:53 PM

It was somewere around that time when they figured out how to get around the egr but I dont know about ls1 without egr.
The real way to know whether it is ls6 is by part number or by looking at the bottom of the intake.
the ls1 has a hump down the middle with a little valley on each side ,and the ls6 is flat all the way accross.
sorry I dont know the part numbers right off the top of my head but google should have it,or search these threads

**0rion** · 01-09-2008, 04:02 AM

your best bet is to go by part numbers.....there were some vette intakes that were LS1's without the EGR ports if I'm not mistaken.

**tnmotown** · 01-09-2008, 06:10 AM

they gave me the part number, here it is PN# 12556333

Where do i go to check the part numbers out?

**firemedic0135** · 01-09-2008, 08:03 AM

http://ls1tech.com/forums/showthread.php?t=228055
check out this thread.

**Y2KPewterSS** · 01-09-2008, 10:58 AM

The Vette LS1 intakes had no EGR provision. Orion has already stated the way to find out for sure.

**tnmotown** · 01-09-2008, 12:33 PM

cool, thanks guys! i should know for sure now

**Wheeler99WS6** · 01-12-2008, 10:05 AM

Originally Posted by 0rion

your best bet is to go by part numbers.....there were some vette intakes that were LS1's without the EGR ports if I'm not mistaken.

very true 97-00 vette had no EGR I believe.

**volleybill** · 01-12-2008, 05:53 PM

Originally Posted by Wheeler99WS6

very true 97-00 vette had no EGR I believe.

As did (didn't?) the '01 and 02 F-body- I believe they changed the cam, with more reversion so EGR wasn't required to meet emission specs- So all 01-02 F cars got the LS6 manifold, and a very small percentage also got the LS6 blocks, as the LS1 blocks were in the proccess of getting phased out.

**Wheeler99WS6** · 01-13-2008, 08:49 AM

Originally Posted by volleybill

As did (didn't?) the '01 and 02 F-body- I believe they changed the cam, with more reversion so EGR wasn't required to meet emission specs- So all 01-02 F cars got the LS6 manifold, and a very small percentage also got the LS6 blocks, as the LS1 blocks were in the proccess of getting phased out.

yep, small change in cam and switch to LS6 intake started in 01 for F-bod.