The hks gt2835 pro s kit has a 4inch -> 3inch reducer anyway! Since the stock turbo intake has probs sucking in under high boost/ temps id just got metal intake straight away!
I just want to add that i have been running Motul 8100 xcess 5w40w for 2 oil changes now and it's been ''rattly''. I put it down to the forged pistons but have dismissed that since running Motul turbolight 10w40w which has made it quiet.
Im with Mr. Untouchable. I removed the bov for 1 week for daily duties and it was a cop to drive. Between gear changes it felt like it took a little longer to boost up. Stock bov on and it's so smooth.
Have the spot welds on the clutch pedal box snapped? I took mine out and rewelded it. Took me like 20/30 mins to take it out the first time. It's way to easy. Grad a torch and look under there, you will be surprised how easy it is!