Home / Shop / Fuelab 525 EFI Adjustable FPR In-Line Large Seat 25-90 PSI (1) -6AN In (1) -6AN Return - Gold

Fuelab 525 EFI Adjustable FPR In-Line Large Seat 25-90 PSI (1) -6AN In (1) -6AN Return - Gold

SKU: FLB52503-5-L-E

Fuel Pressure Regulators

FLB 525 In-Line FPR

Fuelab

Fuelab 525 EFI Adjustable FPR In-Line Large Seat 25-90 PSI (1) -6AN In (1) -6AN Return - Gold

SKU: FLB52503-5-L-E

Fuel Pressure Regulators

FLB 525 In-Line FPR

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

FUELAB 525 Series fuel pressure regulators are designed with performance and flexibility in mind. They feature a return line port built inline with the inlet/outlet fittings--not on the bottom--which is great for tight spaces. The regulators accept port style and non-port style union fittings without interference. Several configurations are available, supporting carbureted applications as low as 1 psi…to fuel injected applications up to 125 psi. The regulators are compatible with gasoline, diesel, methanol, and ethanol; and feature billet aluminum construction, in your choice of anodized finishes for maximum protection. FUELAB 525 Series fuel pressure regulators use a fine thread pitch for precise pressure adjustment. Units include a 1/8 in. NPT port and plug for an external pressure gauge; and a versatile mounting bracket with stainless steel hardware is provided.

Application Summary

Universal

Part Type

Fuel Injection Pressure Regulator O-Ring

Data: v4.2 - Upd: 2026-09-29 01:18:08

Specifications

Product Attributes - Brand: FUELAB
Product Attributes - Manufacturer's Part Number: 52503-5-L-E
Product Attributes - Part Type: Fuel Pressure Regulators
Product Attributes - Product Line: FUELAB 525 Series Fuel Pressure Regulators
Product Attributes - UPC: 845096004170
Product Attributes - Regulator Pressure (psi): 25-90
Product Attributes - Regulator Style: Return
Product Attributes - Regulator Location: Inline
Product Attributes - Boost/Vacuum Reference Port: Yes
Product Attributes - Gauge Port: Yes
Product Attributes - Inlet Quantity: 1
Product Attributes - Regulator Inlet Size: -6 AN
Product Attributes - Inlet Attachment: Female straight cut O-ring
Product Attributes - Outlet Quantity: 1
Product Attributes - Regulator Outlet Size: -6 AN
Product Attributes - Outlet Attachment: Female straight cut O-ring
Product Attributes - Return Fitting Size: -6 AN
Product Attributes - Return Attachment: Female straight cut O-ring
Product Attributes - Fittings Included: No
Product Attributes - Regulator Material: Aluminum
Product Attributes - Regulator Color: Gold
Product Attributes - Rebuildable: Yes
Product Attributes - Mounting Bracket Included: Yes
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Large seat design, 1,000 LPH..

Reference Information

Brand Name/s	Fuelab
StreetFX SKU	flb52503-5-L-E
SFX Item ID	4221466
Supplier Item Code	4221466
Manufacturer SKU	52503-5-L-E
Manufacturer UPC	845096004170
Alternative References	FUE-52503-5-L-E, -6AN