I fitted a R34 gtt cooler to my r33 sedan a few weeks back now, I was lucky enough to get the 34 ducting for it as well which, with 1 little cut, squeezes behind the series 2 front bar nicely. I was interested to note you said the boost was higher at around 2400rpm. I haven't had a chance to put mine on the dyno yet but I thought it felt like it had a little more low end torque. I just thought I may have only been dreaming, can't wait to finish the exhaust, only cat back atm, and increase the boost to around 10psi. Some simple, cheap, stealth mods, I like
The only small issue I had was refitting the inner guard, as the 34 cooler hangs a little lower, it made refitting the inner guard VERY tight. Seems to be all hanging together though it is under alot more tension now....
P.S. I have a few pics of the install on a series 2 R33 in my gallery....