fitting headers

[skeeterone2]

okay... i realise that swapping your heads for better ones is the way to go if you have a 3x00... what im wondering is what eles you have to change besides the heads and maifold... do your headers have to change...chip...ect...?

[geoffinbc]

Yes use 3X00 manifolds the chip in your 3.1L will be fine. Use your 3.1L injectors in the 3X00 fuel rails. EGR will be another issue.

[skeeterone2]

what about the headers can i use my old ones?

[skeeterone2]

or do i use the headers that come with the 3x00... and will a 3400 fit on a 3.1 or must i go with a 3100?

[geoffinbc]

When I said manifold I meant exhaust manifold. Use the 3X00 one. GM engines dont have "headers" they have manifolds.

Headers are tubular. Manifolds are cast single pieces.

[skeeterone2]

Thank you for your input.

[skeeterone2]

Uh oh i was reviewing what people had said on this post... and betterthanyou... you said something about the egr valve... and... that doesnt sound good... if you can give me a brief decription of what you mean that would be awsome.thanks.

[geoffinbc]

The new intakes will not allow the old egr valve to directally mount. You will need an adaptor plate. Alot of people just block it off.

[skeeterone2]

where can i find an adapter plate?

[geoffinbc]

If you 3X00 is older than 2000 then JBP will sell you a plate. If it is 200 or newer then Lloyd and I can provide you a kit.