Yea Swiss is about right all tho I made more but we both wound up with motors that gave up,
I made 412 WHP and 300 Wtrq @ 9 PSI and after the impeller ( Vortch on) I made 457 WHP AND 330 wtrq @ 12 PSI motor lasted 3 days :(

so your motor gave out with just the impeller upgrade, not the impeller and the 9lb pulley?

No Sir

2 1/2 later with the Impeller, 9 Lbs Pully @10.15 at 7'800 U/min and a littel over 500Hp and......
On the high-speed autobahn to the Nürburgring (Nissan Nismo Track-day)

I've overdone it at a long High-Speed Run :stirthepot:

Yes sir mine did, Impeller only and I was seeing 12 PSI , Stock Stillen 8 LBS pulley

OK so i got my BOV and i ordered the single vs the Dual port
Sending it back today and hopefully getting the correct one next week

Can anyone chime in on their experience with just the 9 lb pulley and no impeller upgrade? Impeller upgrade seems dangerous, is the pulley a but safer?

I have a borla exhaust and I got 475 whp 358 torque at 9psi. I've had it for maybe a month now and the only that's given up on me is my clutch. car has under 12k miles