I got my bike mot'd on good friday with race cans on it.
I spoke to the tester on the phone previously and he told me that the law had just changed to what you said.
If the can does not have any markings on it which say 'not for road use' or 'race use only', then subject to the discretion of the tester it can pass.
However, it is a very new thing and some stations may not yet be aware of it.
There's certainly no way I could have got through otherwise as I have no standard cans anymore, and even if I did, they would not fit 50mm headers!
I fitted the db killers off e bay and they work a treat, went straight through the mot with no problems.
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