GTST, my car did not come with a bov, and at the end of the day $20 of materials is still cheaper than $200 for a GFB or $400 for a trust type R.
and what about if you were a machinist or mechanic on an apprentice wage?
I myself bought a secondhand professor sheepdog BOV quite cheap, I stripped it down and completely refurbished it and am planning on modifing it for plumbback, so it looks like ill be in a workshop anyway.
but yeah the point of the thread was to see if people had built their own, and judging by the replys, a few people have and have come up with decent results, take ylwgtr2, who built a bov and a wastegate, a good quality wastegate costs quite abit.
When I was in highschool I used to spend most of my electronics class on the lathe, making up useless crap that I did not need, but I enjoyed being able to think up something, and have the ability to actually create it.
so yeah if I'm ever in a workshop with time to kill, i'll probably make one.