Mike is correct, the twin set-up on our platform is superior for boost response, getting to peak boost faster and hopefully staying there throughout the rev range. Heat is essential for getting proper spool @ the turbo which is another win for a twin system, the turbos are right there. On my build we chose to use wrap and good piping to keep the heat temps up as much as possible in and around the turbo. I've learned a lot about both systems on the VQ platform over the years, for example if we would have run two smaller diameter pipes into a divided T-Flange @ the turbo we would have increased spool up time significantly and the next kit we design will incorporate that change. We also designed the system to be as A-semetrical as possible, keep everything even. Bottom line is price is the biggest attraction the single system has over the twin, I'm not going to sit here and say the single is better, even if I have one. I've had both and I loved them both equally. Like I've said numerous times GTM makes a quality part and you can't go wrong doing business w/ them. I just love turbos.... 2, 1 doesn't matter as long as it isn't a supercharger
I plan on donking Ron's TT Nismo stg II after he's done w/ the install!
Keep up w/ all the great info, I <3 LuRNenG!