3400 Question

[gran_dam98]

Are all the GM 3400 engines in the 2000 and up vehicles pretty much the same?
The junkyards I'm calling say they are the same but I just want to double check. For example, down the road if I want to by TOG headers for the 3400, and I have a Pontiac Aztec engine in my car, am I going to run into problems?

[jeremy96gase]

There where slight changes from 99 to 00, then there where more slight changes in 03.
In terms of headers, the TOG headers will fit all 3100 and 3400's BUT they do NOT work in the 92-98 style Grand Am Engine bay. They hit the firewall.

[gran_dam98]

You positive of that? if so that really sucks, that was one of the mods I was planning on doing first..

thanks for the info though

[gran_dam98]

oh yea, i found an engine out of a 2002 grand am, should i take the ecu or just use mine.??

[95-GT]

Use your computer systems.

[BobGAGT]

The headers wouldnt hit if the downpipe was redone... from what I am told.