O2 Sensor - Wideband LSU 4.9 - Power Grid

The O2 Sensor - Wideband LSU 4.9 - Power Grid by MSD IGNITION is a precision oxygen sensor engineered for serious enthusiasts and tuners who demand real-time air-fuel ratio monitoring. This universal wideband oxygen sensor replaces restrictive OEM narrow-band units, enabling closed-loop fuel mapping and dynamic engine control across carbureted, fuel-injected, and forced-induction applications. Whether you're fine-tuning a street engine, dyno-testing a performance build, or optimizing a forced-induction platform, this sensor delivers the data accuracy needed for consistent results and peak efficiency.

The LSU 4.9 wideband design operates across a broader air-fuel ratio range than traditional narrow-band sensors, providing millivolt output that correlates directly to AFR from 10:1 to 20:1 ratios. The 6 oval male plug connector integrates seamlessly into MSD Power Grid and standalone ECU systems, allowing real-time feedback for ignition timing, boost control, and fuel injection pulse-width adjustments. The sensor's thermal design and robust construction withstand sustained high-temperature exhaust environments, critical for turbo and supercharged platforms where exhaust gas temperatures routinely exceed 900°F.

Engine tuners, performance shops, and data-logging enthusiasts rely on the O2 Sensor - Wideband LSU 4.9 - Power Grid to eliminate guesswork during calibration and diagnostics. The universal design accommodates most exhaust manifold or header mounting locations via standard O2 bung installation, making it ideal for custom builds and retrofits. Compact dimensions and lightweight construction (0.43 lbs) ensure minimal impact on exhaust system packaging, while the proven LSU 4.9 sensing element delivers consistent, noise-free AFR data critical for safe and repeatable tuning sessions.