There's a nipple on the round part, compressor. There's a nipple on the tube part where the compressed air exits. I know one is for the wastegate & the other for the boost gauge. Which do I use for what. Also where do I hook the vacume line of the bov to, what's the best source? Thanks in advance.

 

I've been told that the wastegate works better when powered from after the intercooler. No personal experience from this. Ive had factory turbo cars that were run from either.

For your BOV you need a vacuum/boost source from the engine side of the throttle body.

-Michael

 

It doesn't matter which one goes where. use either nipple for your Wastegate/boost gauge. You BOV, like hackish said, use a vac source between the engine and TB. Brake booster works really well.

 

Ok I understand now. Thank you all.