Holley 12-879 Adjustable Billet By-Pass Regulator Kit 3/8 in. NPT
Holley 12-879 Adjustable Billet By-Pass Regulator Kit 3/8 in. NPT
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Holley

Holley 12-879 Adjustable Billet By-Pass Regulator Kit 3/8 in. NPT

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Key item features

  • Adjustable from 4-65 psi for precise fuel pressure adjustments - 4-15 psi spring installed, optional spring for up to 65 psi included for EFI applications
  • 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 in. NPT Inlet; (1) 3/8 in. NPT Outlet; and (1) 3/8 in. NPT Return Port
  • Includes fitting for manifold boost reference which it compensates for at a 1:1 ratio
  • Has 3/8 in. NPT gauge port - Includes 0-100 psi liquid filled fuel pressure gauge
  • Compatible with diesel fuel and E85

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Current price is $265.95
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  • Free Holiday returns until Jan 31

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Extended holiday returns
Free Holiday returns until Jan 31