Years ago when I first got my R33 ser II GTS25T, I picked up a Turbosmart Tee for it, however, one thing that people have to watch is the hose barbs / nipples on the Tee is slightly smaller in diameter so the factory vac line would pop off if not clamped down properly....Long story short, I was on the freeway that night and all of a sudden I was maxing out my boost gauge at 20+ psi and sideways on the freeway in 5th ! The hose from the Tee to the actuator popped off and the wastegate wasn't opening to regulate boost. The motor would've went 'pop' if I had kept at it but I'd learnt two things that night.... One is to use the correct size vac lines, two is what these motors are capable of with a little extra boost - I wasn't too familiar with these car at the time but that incident accidently showed me the hidden power potential in these RB donks.