right after much thought and searching ive decided to get a custom exhaust mainly because the cat back stainless system is only £230 (cash deal)lol. and im having a look at gettin them to do a downpipe aswell. but what size do you think would be best for the system and downpipe should i stick to the 2.50 that miltek and the rest use or maybe go a bit bigger like 2.75 or 3.00 tubeing.?