DeatschWerks DWR1000iL Adjustable In-Line Fuel Pressure Regulator (6-1001-FRB) MANLEYPISTONSEJ257 that are difficult to tune

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DeatschWerks DWR1000iL Adjustable In-Line Fuel Pressure Regulator (6-1001-FRB) MANLEYPISTONSEJ257 that are difficult to tuneThe DeatschWerks DWR1000iL adjustable in line fuel pressure regulator (AFPR) features one 6AN inlet and a 6AN outlet. Includes a 1 8" NPT gauge port with 3 16" vacuum fitting. Black anodized aluminum body safe for use with E85. The ball bearing top adjustment with 2 psi per turn pressure ratio. The DWR1000iL regulator is engineered to support EFI engines producing between 250HP and 1000HP. This regulator features a compact size and a unique in line