ive : stage two hybrid turbo, race 378 injectors, bmc, sfs hoses, just bought a race spec THS uprated 1.8t pancake pipe, turbo back milltek, rear milltek removed and replaced with 4inch downturned pipe. egr power pipe. sach clutch and flywheel, kw topmounts (fully adjustable) soon to have kw suspension (just have avo springs at moment) everything polybushed. did have dogbone bush but removed couldnt live with the vibration. tbh just putting a brand new oem dogbone on was good. auti tt 3.2 v6 front brakes (same as r32 two pots using 334mm disks) with uprated pads/discs lines. rear now 256 vented audi s3 calipers/carriers with uprated pads discs. oh and crap rs6 rep wheels 18s. oh and old rs tuning map, which will be updated in the next few weeks.
think thats it.
u cant go wrong with a map tbh. depends on budget. i wouldnt bother with exhaust airfilter unless your going hybrid, you only gain couple bhp. your best bet is to look though the tdi section and do some searches, its all be covered.