Product Summary

Universal Fit

    Rebates Available

    See rebate details
    See more details

    Key Specs

    MFG. Part #30-3427
    BrandAEM Electronics
    See more specs

    Need To Know

    Quick and Easy Returns

    Return Policy

    AEM Electronics 30-3427 Details

    Replacement Wiring Harnesses, Sensor Harness for X-Series Wideband Gauge 30-0300 and 30-0334

    Features:

    • Direct replacement for 30-0300 and 30-0334 AFR gauges
    • Works with either Bosch LSU 4.9 sensor or AEM/FAE sensor
    • Long length wiring loom to accommodate most applications
    • Direct connection to Bosch 4.9 and AEM FAE sensor plug

    Rebates

    Holley October Promo 10% Off Select Parts Sale

    Holley October Promo 10% Off Select Parts SaleHolleyOctoberPromo10%OffSelectPartsSale

    Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

    AEM Electronics 30-3427 Specifications

    KEY SPECS
    MFG. Part #30-3427
    BrandAEM Electronics
    GENERAL
    Sold in QuantityEach

    Questions & Answers

    Customer Impersonation Script