Pressure Relief, Valve 4307439

307439 is an OEM pressure relief valve designed to regulate fuel or fluid pressure in commercial truck systems, preventing dangerous over-pressurization. It is primarily used on 8.9L Cummins ISC, ISL, and QSL9 diesel engines (often Tier 4), ensuring system integrity and preventing component damage

Variant-level stock

Inventory status is checked per SKU before checkout.

Shipping

Package specs

Dimensions vary by variant.