Mine is set to negative pressure meaning their is no flow unless the turbo is drawing air in. This has been the hardest part of setting up the complete system, I am still working on perfecting that spring.
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2008 2500 CCSB 4x4 ,EFI Live, ATS IV TRANNY, Stainless Diesel 2nd Generation Swap 467.7 FMW, CNG, .
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