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Holley EFI O2 sensors precisely manage air fuel ratios to keep your engine performing at its peak. Available in Bosch LSU4 and NTK wideband configurations, Holley EFI has the correct sensor for your high performance EFI application.

NTK wideband sensors are recommended when using leaded or methanol fuels, high exhaust temperatures and forced induction applications, or for the highest precision feedback.