Can the TT system be supplied with catalysts?
We are investigating the possibility of adding low loss catalysts in the position normally occupied by the first silencer boxes to satisfy the requirements of some markets where a visual catalyst check is mandatory. It is not practical to incorporate catalysts further forward in a twin pipe system but a lambda feedback sensor (heated type) can still be used which means most cars will still pass a yearly or biennial emission test without the catalyst being present.. Contrary to some beliefs UK cars do not have to have a catalyst to pass an MOT test.