AEM High Capacity universal billet adjustable fuel pressure regulator (PN 25-305BK), CNC-machined from 6061-T6 aluminum with a black anodized finish. A longer spring gives a 40-130 PSI adjustment range and a single large return orifice handles high-flow pumps, with a 1:1 boost-rising rate for boosted builds. Alcohol- and race-fuel compatible; two -6AN inlets, one -6AN return (9/2016-2018 ORB) and a 1/8in NPT gauge port.
| Material | 6061-T6 billet aluminum |
| Finish | Black anodized |
| Adjustment | 40-130 PSI |
| Boost rate | 1:1 rising |
| Ports | 2x -6AN inlet, 1x -6AN return; 1/8in NPT gauge |
| Fuel | Alcohol & race-gas compatible |
| Part Number | 25-305BK |
Documents: Installation Instructions (PDF)
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