i have a mk2 vtr. to fit a 4-2-1 do u have to remove the cat?
4-2-1 manifold
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#1
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#2Your cats in the manifold so yeah it will decat it.
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#3so its an MOT failure yh?
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#4Yes, but you can get a cat that goes under the car, typically from a mk1, but also on some of the early mk2's and use that and it should be fine
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#5As above, cant get a cat in the middle section, or if you wanted to refit the standard manifold, come MOT time, and enjoy the gains of a 4-2-1 and Decat all in one