★★★★★ 4
Good parts
They fit
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Reviewed in the United States on May 5, 2026
FlexFuel Pressure External Regulator Bypass Plug w/ Gauge for LS Truck Intake Manifold Rail
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
FlexFuel Pressure External Regulator Bypass Plug w/ Gauge for LS Truck Intake Manifold RailLS FlexFuel Pressure Regulator Plug w Gauge Port Installs in place of factory integrated flexfuel pressure regulator that is mounted to the fuel rail on truck intake manifolds *** ONLY compatible with Flex Fuel rails*** Required when using an external fuel pressure regulator Compatible with (1999 2003) LS Gen 3 truck SUV round FlexFuel rails Made in Wichita Kansas, from aerospace grade billet aluminum Includes adapter plug and oring Plug has a 1 8 27
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- Standard: 3-7 business days
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- 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]
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4.3 ★★★★★
Based on 1278 reviews
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Product Reviews
★★★★★ 5
Todo perfecto 10/10
Todo muy bien 10/10 exelente.
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Reviewed in the United States on March 21, 2026
★★★★★ 5
N54 engine — it fit absolutely perfectly.
N54 engine — it fit absolutely perfectly.
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Reviewed in the United States on March 17, 2026
★★★★★ 5
Works well
This works as a fancy oil cap remover. I wish my oil cap looked this nice.
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Reviewed in the United States on May 25, 2025
★★★★★ 3
Well built
Well made product. I have an volvo xc60 and it fits the oil filter housing perfectly but because of its thickness, there's some interference with the heat shield or it could be part of the skid plate assembly that is next to the filter housing.
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Reviewed in the United States on April 23, 2025
