Perrin Subaru 08-21 Subaru STi Black Adjustable Fuel Pressure Regulator Kit (perPSP-FUL-301)

Regular price $310.89 USD Sale price $310.89 USD Regular price $385.00 USD
Sale 19.25% $74.11 USD (19.25%)
Special order - Ships in 5+ weeks
SKU: perPSP-FUL-301
Product Description

The PERRIN Adjustable Fuel Pressure Regulator is the ideal solution to address the stumbling issue present in STIs manufactured in 2008 and later. It was developed with flexibility and high-flow fuel control in mind. Four of the Adjustable Fuel Pressure Regulator's six ports—out of a total of six—are used to attach to your fuel rails for optimal flow. This kit's replaceable orifices allow it to function flawlessly with both stock and significantly modified engines and has a fuel flow rating of 1,000+ horsepower.

Your 2008-2015 STI's bulky and unnecessarily complicated OEM fuel pressure regulator is replaced by the PERRIN Adjustable Fuel Pressure Regulator. The common gripe of STI owners that their car sputters around 3,000 rpm is much diminished by removing the OEM component as well as the two fuel pressure dampeners. After years of research and development, a design that works for applications ranging from stock to significantly changed was chosen. It is possible to set the PERRIN Adjustable Fuel Pressure Regulator from 20 psi to the maximum fuel pump capacity. This enables you to give more fuel to your engine without having to adjust your ECU's settings. For stock fuel pumps, larger drop-in pumps, and fuel systems supporting 1,000+ horsepower, three replaceable orifices are provided. There are (6) -6 ports on the Adjustable Fuel Pressure Regulator: (1) for fuel pump feed, (2) for fuel rail feed, (2) for fuel rail return, and (1) for fuel tank return. This allows for easy installation of aftermarket fuel rail kits that utilize more than one rail. The PERRIN Adjustable Fuel Pressure Regulator is easy to install as it bolts right into the existing threads where the OEM fuel pressure regulator assembly is normally housed. Installation of this kit requires no special tools.

The PERRIN Adjustable Fuel Pressure Regulator features a port concealed on the bottom of its assembly, unlike fuel pressure regulators made by competitors. The installation of aftermarket fuel pressure sensors and/or gauges is possible thanks to this 1/8th NPT threaded port. Patent No. 6,298,828 protects internal parts. The technology relating to the characteristics of the Adjustable Fuel Pressure Regulator is licensed to PERRIN Performance for use in these components. Utilizing this tried-and-true technology guarantees that interior parts will hold up for the whole life of your car. The PERRIN Adjustable Fuel Pressure Regulator comes with a black anodized finish to make certain your part continues to look good and resist corrosion during its use. For your convenience, the ports are labeled according to their proper connections.


  • Subaru STi (2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021)


Port Size -6 with O-ring seal
Pressure Ratio 1:1
Included Orifice Sizes 0.1", 0.2"
Pressure Range 25 psi - maximum pressure fuel pump delivers
Material 6061 billet aluminum
Finish Anodize


(1) PERRIN Fuel Pressure Regulator assembly
(4) Oetiker clamps
(1) M6 Cap screw
(1) M6 Fender washer
(1) M6 Lock-nut
(1) Bracket
(1) 5/32" ID Vacuum hose
(1) M5 Short arm hex key
(1) 3/32 Short arm hex key
(2) Zip ties
Warranty & Instructions

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck & international items, will require up to 7 business days to ship due to size and logistics.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Unless otherwise noted as "In Stock" or exact ETA. Special Order items have an ETA of 5+ weeks.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $100.

All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

Processing and logistics on in stock international orders can take up to 7 business days to process & ship.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

Customer Reviews

Be the first to write a review