Unless told otherwise stick with the ZS unit, ZT I believe is not a straight drop in but easily done with swapping parts. Not 100% sure what the differences are when it comes to the spec but believe it runs a different exhaust cam and ecu as the breathing is so different between the two cars. I'm sure someone will step in and give us the facts as my memory is fading!
Post your questions and we'll help where we can, it's no problem.
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