IVA test

[Big Vern]

For the IVA test the emissions requirement of your kit car is NOT related to the age of the donor vehicle anymore but the age of the engine you use.
The emissions test at IVA determines the emissions test your kit will be subjected to at every subsequent MOT.

Production cars were required to run a catalyst from August 1st 1992
Concession was given to some manufacturers (mainly Ford) due to cat systems failing within the vehicles first 3 years (thus failing the first MOT) problem was resolved by 1995.
In the IVA manual you will see the flow chart showing that a kit car using a pre 1995 engine will not need a catalyst.

HTH BV.