Had my TTA about a month. Car has 18,000 miles showroom condition. Drove her when she arrive after unloading her of truck. Ran strong. Park her in garage and started looking at all the goodies available for these cars. So far fixed leaking rear main seal (by the way it was the rtv not the seal). Car already had 160 therostat and thrasher chip. Installed 8 inch K&N air filter after removing stock air box. Could not stand the looks of it (very tacky with stock mass air flow pipe). Then ordered stock K&N filter and disc to replace bottom half of stock air box. Filter is fully exposed on lower half but still looks stock. It looks much better but I don't know if it will flow sufficient air with the other mods I've made. The other things I have done is install walbro 340 feul pump and hotwire kit (removing feul tank was not near as bad as all the horror stories I've read about). Put on 100lbs vavle springs & new intake valve seals, adjustable feul pressure regulator. Also installed houston downpipe with dump (boy now thats a tight fit). Found small holes in pipe that runs between cat converter and muffler so I install hooker exhaust. Finally got to drive her today. She knocked some so I had to lower boost pressure. Took her for another spin did better at about 17-18 pounds boost. Just what to know if stock injector are sufficient with this combination or should they be up graded? and to what. Stock turbo. Thanks