Mongoose are top of the tree for me....although the one i won on ebay was for a mk 4 so thats going on my mk 4
im now in the market for one for my mk 3, mongoose i think it will be and second on my list is a magnex or maybe a scorpion.
powerflow in leeds say it would be 320 cash for a cat back system fitted...thats for a mk 3 8v...
i spoke to them the other day about my mk 4 mongoose back box i need fitting so asked them about their mk 3 systems..