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Best-SellerPart# 30-0300Free ShippingIn Stock
MSRP $259.95$206.95Save $53.00
Best-SellerAEMAEM Classic Digital Wideband AFR Gauge Kit LSU 4.9 Sensor - Interchangeable bezels and face includedPart# 30-4110Free ShippingIn Stock
MSRP $233.95$186.95Save $47.00
Best-SellerPart# 30-0334Free ShippingIn Stock
MSRP $337.95$268.95Save $69.00
Best-SellerIn Stock
MSRP $175.95$140.35Save $35.60
TrendingPart# 30-0310Free ShippingEst. Ship Date: 11/02/2026
MSRP $249.95$198.95Save $51.00
Best-SellerIn Stock
MSRP $185.95$148.45Save $37.50
In Stock
MSRP $132.95$106.15Save $26.80- AEMAEM Classic Digital Wideband AFR Gauge (Sensor Not Included) The Original Wideband Air/Fuel Ratio Gauge (No Sensor)
In Stock
MSRP $175.95$140.35Save $35.60 
In Stock
MSRP $40.46$32.36Save $8.10
In Stock
MSRP $48.31$38.65Save $9.66
In Stock
MSRP $24.78$19.83Save $4.95
AEMAEM Bosch LSU 4.2 Wideband UEGO Installation Kit AEM Bosch LSU 4.2 Wideband Sensor, Bung, Connector, Wire-Seals and Pins.Part# 30-2002Free ShippingIn Stock
MSRP $251.95$200.95Save $51.00
Est. Ship Date: Coming Soon
MSRP $79.95$63.80Save $16.15
Part# 30-2063Free ShippingEst. Ship Date: 10/05/2026
MSRP $188.95$151.15Save $37.80
In Stock
MSRP $79.95$63.80Save $16.15
In Stock
MSRP $16.93$13.55Save $3.38
In Stock
MSRP $79.95$63.80Save $16.15
Part# VK080036Free ShippingEst. Ship Date: 11/02/2026
$594.85
Wideband Gauges
Shop AEM wideband AFR gauges, inline controllers, oxygen sensors, harnesses, O2 sensor mounts, bungs, and installation accessories. Explore X-Series, Classic Series, OBDII CAN bus, and dual-channel wideband solutions for accurately monitoring air/fuel ratio and lambda in street and racing vehicles.