Aeromotive Pro-Series EFI Boost Reference Regulator

Aeromotive Pro-Series EFI Boost Reference Regulator

Marsoni

M251S

$248.16

Get it in 3 business days with 1 day shipping. Friday, May 29

Aeromotive Pro-Series EFI Boost Reference RegulatorThe tuner s choice for high horsepower EFI applications. The Pro Series Regulator can support up to 2000 HP. For engines requiring high volume, high pressure fuel delivery, the Pro Series Boost Reference EFI Regulator is a perfect fit for serious power. Adjustable base pressure from 30 75 PSI with the spring installed. Adjustable base pressure from 75 125 PSI with the optional spring included. Ideal for Pro Series, Brushless 3. 5 and Brushless 5. 0

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Used it as directed. Down to an eighth of a tank. Poured it in and added enough gas to get back to one half a tank. Wanted to get it mixed in really well. Immediately jumped on the interstate and ran 75 MPH for 40 miles. Stopped and filled the tank and when I restarted the engine, the light was off. Coincidence? Not a chance. Light had been on continuously for weeks. AutoZone said I needed a catalytic converter. Nope. One thing I found out the hard way. If your gas filler has a flap at the top, make sure it is easy to push aside. Mine had a little release button near the top that the filler hose would depress before the flap would release. Dumped the first bottle right on the ground. Twelve bucks wasted. No one to blame but me, I guess. Still a bargain, even at twice the price.

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Reviewed in the United States on February 17, 2026