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If your Cummins is running rough, a bad EGR valve might be the culprit.

This new valve from speedmotor2012 fits L10, M11, and ISM 10.8L engines.

It replaces a ton of OEM numbers: 4955421, 4955421RX, 4089379, 4089493, 4921905, and more.
We’ve included the gaskets in the box, so you have everything you need for the swap.

Mounts on the lower part of the engine.

Built to get your rig back to proper emissions and performance specs.

Backed by a 1-year warranty, so you can install with confidence.
Made in China, but meets all the specs for a direct replacement.4 out of 5