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That's an E99. An easy way to tell visually (assuming it's stock) is to see if there's an AIH relay next to the GPR.
Here's a document that shows some of the differences between the E99 and later engines. Click the link and scroll down to the document that says "1999.5 DIT Engine Update".
Yep, I took that picture so vinford would have an example.
Sorry for no explanation, I'm not thinking clearly, haven't since the beginning of the week, not 100% of normal anyhow. Been sick, tonsils are sore and swollen. Ear conals itch a little bit, going to see a doc today.