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Guaranteed Fitment
Always the correct part
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In-House Experts
We know our products
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Technical Support
We help with any installation questions
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Wordwide Delivery
Fast shipping times
The Bosch LSU4 Oxygen Sensor is widely used in the FAST product line. Finding its way into the FAST EZ-EFI Fuel, EZ-EFI Fuel + Igniton as well as the XFI Sportsman and even the FAST Air/Fuel Meters, the LSU4 is accurate, durable and essential to the operation of a number of FAST products.
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