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Best-SellerPart# 30-0300Free ShippingIn Stock
$230.95
Best-SellerAEMAEM Classic Digital Wideband AFR Gauge Kit LSU 4.9 Sensor - Interchangeable bezels and face includedPart# 30-4110Free ShippingEst. Ship Date: Coming Soon
$207.95
Best-SellerPart# 30-0334Free ShippingIn Stock
$299.95
Best-SellerPart# 30-2004Free ShippingIn Stock
$155.95
TrendingPart# 30-0310Free ShippingEst. Ship Date: 12/01/2026
$221.95
Best-SellerPart# 30-2404Free ShippingIn Stock
$164.95
Best-SellerIn Stock
$117.95- TrendingAEMAEM Classic Digital Wideband AFR Gauge (Sensor Not Included) The Original Wideband Air/Fuel Ratio Gauge (No Sensor)Part# 30-4110NSFree Shipping
In Stock
$155.95 
Est. Ship Date: 12/21/2026
$35.96
In Stock
$42.94
In Stock
$22.03
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
$223.95
In Stock
$70.89
Part# 30-2063Free ShippingIn Stock
$167.95
In Stock
$15.05
In Stock
$70.89
In Stock
$70.89
TrendingAEMAEM X-Series Plus Wideband UEGO AFR Gauge Kit 8.50:1 to 18:1 AFR Scale - Black Bezel - Black FacePart# 30-0500Free ShippingPre-Order
Est. Ship Date: 12/15/2026
$244.95- TrendingPart# 30-0534Free Shipping
Pre-Order
Est. Ship Date: 12/15/2026
$299.95 
Part# VK080036Free ShippingEst. Ship Date: 12/01/2026
$663.85
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.