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What does EWT and FAT mean?

Holden Holden Advice Holden Caprice Holden Caprice Advice Holden Caprice 2011
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There is a HSVi ID plate under the bonnet of my 2011 Holden Caprice. There are two codes on it, EWT and FAT, could you tell me what they mean?

The HSVi plate on your car suggests it was ordered with some off-line upgrades when it was bought new. This was pretty common among those buying brand-new Holdens but for budget or company-policy reasons, couldn’t stretch to an actual HSV. The modifications were done by a sister company to HSV, called HSVindividual but the modifications themselves weren’t necessarily that same ones found on a HSV vehicle. In fact, many of the mods were pretty pedestrian, including cargo-liners for utes and even roo-bars for Holden models.

Other common modifications included sunroofs and bigger wheels and tyres and although nobody seems to have a list of what codes meant what modifications, any code that starts with `EW’ seems to relates to alloy wheels. So I’d imagine the EWT relates to that. As for FAT, I can’t find any reference to it on any information source; perhaps it has something to do with the Automatic Transmission?

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