★★★★★ 5
Good filter!
I have used this replacement filter for the past 5 changes. Works great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
Siemens 668cc High Resistance Fuel Injector
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Siemens 668cc High Resistance Fuel InjectorThese injectors flow 60 lbs hr at 43. 5 PSI ( 3 BAR ) and up to 85 lbs hr at 87 PSI! In addition, these units are high impedance so no need to add ballast resistors making them compatible with most engine management systems. Despite the high flow rate, they are linear and controllable at low pulse widths and have been used in ULEV applications! This allows you to use a larger injector than normally possible without hurting idle and low speed
Quick Dispatch:
Your Siemens 668cc High Resistance Fuel Injector orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Siemens 668cc High Resistance Fuel Injector ships.
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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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Product Reviews
★★★★★ 5
Saved money
Saved money d.i.y.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
★★★★★ 5
Fits my 2015 Subaru Forester perfectly
Works as designed.
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Reviewed in the United States on April 2, 2026
★★★★★ 5
Works in 2019 Subaru Outback!
If you are looking for an engine air filter to fit in your 2019 Subaru Outback then look no further -this one will fit. I tried two others that would not allow me to close the compartment door with the latches. This one slipped in like a hand in a glove.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
great filter at a great price!
Fit perfectly in the filter box, looks well built as far as gas improvement its to early to tell, car drove fine with is installed but it was just installed last night and I have only driven it 30 miles since the install!! I will update if it changes but the price sold me on this along with other reviews! I would buy again at this point!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2025
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