If so, what were your power gains? Are there any adverse effects to driveability/boost/etc.? Whose housing are you running?

From what I understand, it's worth an additional 10-15 WHP.

 

Every turbo with an internal wastegate needs a SPLIT flange O2 housing. The separate pipe for the wastegate will not slow down the turbine wheel as it happens on the stock housing.

For a picture of split downpipes look at the end of teh exhaust section for 300zx on our website.

George

 

We have one that gave appx 5-7whp.. obviously not a very impressive gain, but it's worth it more for overall drivability and full powerband gains.. it helps spool-up very nicely!