BBK 1714 Fuel Pressure Regulator For 85-92 Chevy Camaro & Firebird 5.0L 5.7L. Allows Fuel Pressure Adjustment up to Approximately 65psi. Direct Replacement for Stock Non-Adjustable Regulator. NOTE: Reuses Factory OE Regulator Diaphragm & Spring (Not Included). Easy Adjustment by the Simple Twist of a Screw. Optimize Your TPI Engine’s Air/Fuel Ratio. BBK billet fuel pressure regulators are a great way to tune your F-Body’s engine to obtain optimum air/fuel ratios and achieve maximum horsepower. Each fuel pressure regulator is made from high quality CNC machined billet aluminum with a long lasting anodized blue finish. This Camaro fuel pressure regulator will allow fuel pressure adjustment to approximately 65psi. These BBK fuel pressure regulators are direct replacements for your stock pre-set regulator and offer the best performance and value. Once installed you can simply turn the adjustment screw to increase or decrease fuel pressure. Installation is easy and can be done in about an hour with basic tools. You just need to remove your upper plenum to access the stock pressure regulator cover. Then you simply swap the BBK adjustable regulator cover in place of the stock one and reassemble with the OEM diaphragm.