IVA Passed - tax question

[Mjpmark2]

Hi all, following a successful IVA test I'm now trying to work my way through the registration process.

Looking at my IVA certificate there is no data for the CO2, as i think they do a basic check for the engine pre 1992 emissions test 1200 ppm on hydrocarbons and 5% co.

So when completing the paperwork it asks me to send in a cheque to tax the vehicle however I've no idea what to select. Do I go off the original manufacturers data, or with our IVA Cats in place do I need to get another test for the actual co2 emissions as it is now.

If anyone has any insight be great to get a little advice.

Thanks

[Mjpmark2]

Equus,

Thanks for that so am I right in think my excise cheque should be be a total of £225.00 for a 5.0 v12. (12 months on the PLG Table).

Thanks for info really appreciated.