there arnt any rules as such,
but a few i no
ur car must b abel 2 get on the ramp for an mot, (when you need 1
) if its to low it can fail,
but some can test the brakes ect other ways.
if you have a should cat in the zorst, its best to hav it in 4 mot, if u pass with out it,
1, ur lucky
2, ur engine is is good nick.
when you get the car insured over here you must tell them what mods you have done,
hope this helps,
paul
