Re: Bob galla pipe?
you need a 2" OD pipe and it *should* be on a 2" centerline radius otherwise you will be clamping on the bend radius and the fit is poor. We just had (100) 2" 90 deg bends bent up on a 2" CLR (6061 T6 .065 aluminum), so if you are a DIY'er i can sell them for $20ea. You will just have to cut, trim, deburr, and beadroll the pipe.
The polished bends on ebay are from China and do not weld as well as the USA milled finish. Keep that in mind with the BOV, make sure you have someone that can tig weld aluminum for the flange.