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Revive Your Cummins ISC/ISL Engine with the Grizzly 4076442RX CAPS Fuel Pump When it comes to keeping your Cummins 8.3L ISC or 8.9L ISL engine running strong, fuel system reliability is non-negotiable. That’s where the Grizzly 4076442RX Remanufactured CAPS Fuel Pump steps in — a powerhouse solution designed to restore performance, reduce downtime, and save you money. Why Choose the Grizzly 4076442RX? Grizzly’s reputation for quality remanufactured diesel components is …