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Holley Adjustable Billet By-Pass Regulator, 3/8" NPT

$186.95

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Adjustable billet by-pass return style fuel pressure regulator 3/8" NPT
Boost Reference - 1:1
  • Adjustable from 4-65 psi for precise fuel pressure adjustments
  • Constructed of billet aluminum with a black anodized base and a clear anodized top for good looks
  • Used in systems with a return line back to the tank
  • ((1) 3/8" NPT Inlet; (1) 3/8" NPT Outlet; and (1) 3/8" NPT Return Port
  • Includes fitting for manifold reference
  • Includes an 1/8 NPT gauge port
  • Boost Reference - 1:1
  • 4-15psi spring comes installed in the regulator


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  • Model: 12-879
  • FROM: Holley

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we added this on Friday 02 February, 2018.

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