★★★★★ 5
Perfect fit
Nice replacement on my 2016 Subaru Forester
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Reviewed in the United States on April 28, 2026
Fuel Pressure External Regulator Bypass Plug w/ Gauge for LS1 Intake Manifold Rail
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Fuel Pressure External Regulator Bypass Plug w/ Gauge for LS1 Intake Manifold RailBypass plug with integrated port for fuel pressure monitoring or sensors This bypass plug is designed to replace the factory fuel pressure regulator on LS1 intake manifold rails when using an external fuel pressure regulator. Unlike standard plugs, this version includes a 1 8" NPT threaded port to allow installation of a fuel pressure gauge or sensormaking it ideal for tuning or diagnostics. Compatible with 19972006 5. 7L LS1 engines. Includes 1 plug
Quick Dispatch:
Your Fuel Pressure External Regulator Bypass Plug w/ Gauge for LS1 Intake Manifold Rail orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.5 ★★★★★
Based on 1742 reviews
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Product Reviews
★★★★★ 5
Perfect Fit for 2018 Forester
I've purchased various filters from EP Auto and each one matches the vehicle's needs and is a good value.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
★★★★★ 4
Easy self maintenance.
Does the job of what theu try to upset you Valvoline for a fraction of the price and easy to install.
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Reviewed in the United States on August 27, 2025
★★★★★ 5
Good filter!
I have used this replacement filter for the past 5 changes. Works great
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Saved money
Saved money d.i.y.
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Reviewed in the United States on April 20, 2026
