Hi everyone apologies for the lengthy post beforehand.I've owned a 2006 A4 SE Quattro saloon for around 4yrs now it's been absolutely bulletproof but it's approaching 100k now and for the last few months it's been 1 niggle after another.nothing major just little things but I decided it was time to get rid and buy something newer before things escalated. I began looking around at various other options but basically I couldn't stretch far enough and everything that I wanted was out of my reach so I began to consider other more affordable alternatives. The Audi is a great car but I've never found it exciting to be honest and always felt it lacked in power but I've always considered the Quattro system to be fantastic so Realising that I've already got a car that's bought and paid for with 4wd that can put the power down I've decided to spend a fraction of the cost of a new car on modifying the Audi instead. So after lots and lots of hrs of researching and gathering information I've now begun but there's still quite a few questions that I can't seem to find the answers to so if anyone could help me out I'd appreciate the help because this is my first go at modding anything. Here's what I've purchased so far and were I'm presently at. Airtech front mounted intercooler (god if only the bumper was as easy to remove as the intercooler was to install afterwards) Carbonio (probably spelt that wrong) carbon fibre housing for cone filter and silicone hose to intake. New febi high pressure mechanical fuel pump with a new cam follower and an autotech 10.127.100k high volume kit. 034 high flow cat. These are the things that I'm planning on getting. resonated milltek cat back system does anyone know how loud this is please? because I don't want to sound like a typhoon approaching. Yellow stuff front pads do I need to do the rear as well? New clutch kit. Do I need to upgrade to a performance kit or will a standard one suffice? Stage 2+ revo software but I've already bought a set of new S3 injectors so maybe stage 3 if I can stretch to a K03 hybrid. I've seen quite a few brand new on eBay priced at around £250-£450 does anyone know if these are reliable? or are they just cheap c**p. Any advice,suggestions about any of this then please offer it up cheers.