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decat or hollowing

  1. Alfa gt decat/hollowing cat ?

    Alfa 147, 156 & GT
    Hi I have been looking at buying another cat for my 2004 gt jtd will this for mine http://pages.ebay.com/link/?nav=item.view&alt=web&id=271814311510 This says precat so do I have a secondary one aswell I can see a box in the middle but assumed it was just a centre silencer Are 147 cats the...
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