Emmission differences

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Jun 22, 2011 | 04:00 AM

MikeyZ

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Emmission differences

is there any differences between a 99 ls1 and a 2000 ls1?

Part numbers anything?

Jun 27, 2011 | 11:35 PM

Big&Tasty TA

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I believe the air pump might be different, not 100% sure.

Jun 28, 2011 | 12:51 AM

orangeapeel

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From: Justin, TX

I think they are identical.

Jun 28, 2011 | 12:59 AM

Starz T/A 17

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Yes, the way the air pump hooks up is different since the manifolds were redesigned for 2000+ cars. Although they both have EGR and AIR there are some slight differences. Which is why if you look up headers there are 3 different part numbers for most brands 98 and 99, 2000, and 01 and 02 cars.

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