Porting a 3 bolt .85 housing

[turbotwister]

has anyone had experience porting a 3 bolt precision exhaust housing? I have a .85 housing on my HPQ and wondering if I can improve on it's flow.

 

[dank GN]

Yes I actully made a video of me porting my 71HPQ .

 

[turbotwister]

Yes I actully made a video of me porting my 71HPQ .

Any info would be appreciated.