I'm putting together my new setup and planning on using preassembled line that are teflon/braided lines. I'm wanting to use all 1/8'' npt to -an fittings since the lines are -an but which size should I go with -3 or -4 for my vac/boost lines from bov,wastegates,boost solenoid,etc? I can get more options in -3 but didn't know if that was too small then I will get the -4

 

For vac/boost Ref the smaller the better.

 

that's also what I thought even the boost gauge lines are so small figured that was the case.

any other input on this?

 

yep -3 is as big as id wanna go with vac lines matey

 

im running -3an for my BOV and also to my boost solonoid with no problems

 

cool thanks guys. Any pics of your braided setups and what lines did you buy and using?