I was running a hks welded on to my injen piping but decided to go back to stock bpv... so I just threw a rubber cap on the vaccum port on the hks and its leaking and making the car run werid.. so I would like to keep the piping and flange but get rid of the bov.... is there some type of block off I can replace it with???

 

i guess just buy another HKS style flange off ebay and weld a plate to it then attach it to the flange on the charge pipe.

 

Measure the thickness of the base of the hks bov and buy some piece of aluminum in that thickness, cut out a circle the same size as the hks bov and pop that plate onto the flange and secure it with the snap ring.

 

Can't you just disconnect the BOV and leave it there? You might be able to find someone who will trade you pipes.