bov pipe flange with 87 mm mounting holes

[JC71]

looking for a 60-63 mm / 2 1/2 diameter T pipe like attached with a BOV flange that has a 87 mm center to center spread.

is there specific term used to describe this size of BOV mounting?

I find some listed as GD, RS ,FV,RZ type...what do each of these type specify?

 

Edited September 24 by JC71

[GTSBoy]

Most of us just buy or make the flange and weld it to the actual pipework that we're making the cooler pipe out of. A flange like that can be made with hand tools if need be.

[morboost]

RS ,FV,RZ these are all greddy model names a google showed 66mm bolt spacing for these, gd could be wrx gd.

87mm seem to big its the common nissan size exhaust flange 2 bolt spacing