Holley EFI O2 Sensor

Marsoni

M251S

$199.95

Get it in 3 business days with 1 day shipping. Friday, May 29

Holley EFI O2 SensorHolley EFI Bosch Wideband Oxygen Sensor Direct replacement for Holley HP, Dominator, Avenger, and Terminator EFI systems Hand calibrated for precise air fuel ratio monitoring Screw in installation with 18mm x 1. 5 thread size 7 wire configuration with 8 pin rectangular plug Ensures optimal engine performance through accurate data

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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.
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This suit was perfect for my son. The fit was exactly as expected. The quality is excellent for the price—it feels well made and durable enough to last through multiple wears. It doesn’t feel cheap or flimsy at all. It also looks really good on him. Clean, polished, and great for formal events like weddings or parties. Overall, a fantastic value with great quality and a great fit.

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Reviewed in the United States on May 9, 2026