Upgraded Mazdaspeed Relief Valve by TheSpeedSource

If you’re on this page, you already know exactly what this is and why your car needs it.

This is the direct-replacement Fuel Pressure Relief Valve (FPRV) designed and upgraded by TheSpeedSource. (This is the valve we swear by in the AyreSpeedworks built shop car among others that have been through our shop.

The upgraded the design includes an ethanol-safe, stainless steel inlet filter to replace the fragile, restrictive factory plastic filter. Plus, every valve now comes with a brand-new crush washer and the exact tested pressure marked right on the unit.

The Filter Breakdown (See Comparison Image)

• On the Left: The typical OEM filter on an untouched FPRV. It’s dark, clogged, and obviously not ideal. If you haven’t checked yours lately, this is likely what's waiting for you.

• In the Center: A less common OEM filter with a bit less carbon and varnish buildup.

• On the Right: Stainless steel filter, engineered to go with the flow, not fight against it.

Why Replace It?

Factory OEM filters are notorious for breaking. When they fail, they cause massive fuel pressure issues ranging from dangerous pressure spikes and runaways to a complete loss of high pressure. This leaves your car running incredibly poorly, or not at all.

These are ultrasonically cleaned OEM units, upgraded with pre-installed E85 compatible stainless steel filters, and arrive ready to drop straight into your fuel rail. Every single unit is individually verified on a custom-built rig to ensure flawless performance.

Our upgraded valves take the gamble out of buying a sketchy used unit, and they’re a massive relief compared to the mind-boggling $175 price tag of a new OEM valve. Get yours for just $80 shipped anywhere in the US (International shipping is also available).

LIFETIME WARRANTY: If our upgraded unit EVER fails on you, send it back for a free replacement. We will even cover the shipping both ways!

All items ship same or next day!