Perrin Universal Fitment Black Adjustable Fuel Pressure Regulator Kit (perASM-FUL-300)

Regular price $281.82 USD Sale price $281.82 USD Regular price $349.00 USD
Sale 19.25% $67.18 USD (19.25%)
Special order - Ships in 5+ weeks
SKU: perASM-FUL-300
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.

Increase Horsepower and torque without ECU recalibration or tune! This part is designed and tested to work safely on your vehicle without any tuning required! However, more power can be gained with proper ECU tuning. Of the 6-ports on the Adjustable Fuel Pressure Regulator, four of these ports are used to connect to your fuel rails with maximum flow in mind. Rated to 1,000+ horsepower worth of fuel flow, this kit works perfectly with stock engines. The PERRIN Adjustable Fuel Pressure Regulator replaces the cumbersome and overly-complicated OEM fuel pressure regulator on your 2008-2018 STI. Removing the OEM part along with the two fuel pressure dampeners significantly reduces the common complaint from STI owners that their car stumbles around 3,000 rpm. After years of development, a design was settled upon that works for applications ranging from stock to heavily modified.

The PERRIN Adjustable Fuel Pressure Regulator can be adjusted from 20 psi to maximum fuel pump capacity. This allows for added fuel delivery to your engine without recalibrating your ECU. There are 6-ports on the Adjustable Fuel Pressure Regulator: (1) for fuel pump need, (2) for fuel rail need, (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. Unlike competitors' fuel pressure regulators, the PERRIN Adjustable Fuel Pressure Regulator has a port located discretely on the bottom of its assembly. This 1/8th NPT threaded port allows for the installation of aftermarket fuel pressure sensors and/or gauges.

Internal components protected under Patent # 6,298,828. These components are licensed to PERRIN Performance for the technology related to the Adjustable Fuel Pressure Regulator's features. Using this proven technology ensures internal components will last the duration of your vehicle's life. 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.




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
(2) M6 Cap screw
(2) M6 Fender washer
(2) M6 Lock-nut
(1) 5/32" ID Vacuum hose
(1) M5 Short arm hex key
(1) 3/32 Short arm hex key
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

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