Oil feed line size for twins

STROKETHISF350

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Sep 1, 2012
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Just curious if I'd be okay running -4 lines for both of my turbos. I know stock is -6 but the smaller line is so much easier to route in tight spots. I know that some people use very small oil restrictors so I figured it be fine but better safe than sorry. What do you guys think?


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We have -4 on secondary (s475) and -6 on primary (s591). Both seem to work just fine.


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