AEM Fuel Pressure Regulator Rebuild Kit
Keep your fuel delivery locked in with the genuine Racedom-supplied AEM Fuel Pressure Regulator Rebuild Kit (25-392). If your fuel pressure has started hunting at idle or dropping off under load, you don't need a whole new unit you just need a fresh core. This official service pack swaps out your worn internal diaphragm, bringing your AEM billet regulator back to its original dyno-proven accuracy. Perfect for a quick mid-season refresh or an essential addition to your track-day spares box.
Get Your Tune Back on Target: Genuine AEM 25-392 Regulator Rebuild Kit
When you're pushing a build to its limits, precision is everything. If your fuel pressure is acting erratic or your air-fuel ratios are throwing weird spikes on the dyno, the culprit is often right inside your regulator. Constant abuse from high-flow aftermarket pumps and hard heat cycles will naturally wear down any regulator's internal components over time.
Instead of scraping a perfectly good piece of hardware, this AEM 25-392 Overhaul Kit gives you a factory-fresh reset. We recommend this kit to anyone running high-mileage AEM billet bypass-style regulators to completely eliminate internal bleed-through and restore crisp, instant pressure response.
Rather than a generic aftermarket copy, this is the official, heavy-duty kit containing a fuel-resistant diaphragm built to handle constant pressure cycling, a dedicated high-flow discharge return orifice, and a premium Viton sealing O-ring that won't degrade under high fuel temperatures.
What’s inside the AEM Package:
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(1) Factory AEM Replacement Diaphragm: Engineered for high stability and consistent fuel volume management.
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(1) Precision Return Orifice: Maximizes fluid dynamics back to your return lines.
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(1) High-Temp Viton O-Ring: Locks down the body seals for zero external leaks.
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(1) Clear Installation Blueprint Guide.
Compatible Models:
This kit is a universal service standard for the classic AEM bolt-on and universal lines, matching part numbers: 25-300BK, 25-301BK, 25-302BK (Universal NPT), 25-303BK, 25-304BK, and the 25-305BK High-Capacity setups.
Don't risk a lean spike under high boost over a simple wearable part. Fresh internals mean reliable pressure, and reliable pressure means a safer, faster build.
