GRAND ROCK Grand Rock TRF-4625 4"X1.25 ID/FLARE ALZ Part No: TRF-4625

The Grand Rock TRF-4625 turbo repair flange is engineered for durability in heavy-duty exhaust systems where reliability matters. With a 4″ internal diameter and 1.25″ flare geometry, it’s designed to replace the OEM Cat part number 9N-6325 and resist the thermal and mechanical stresses of turbocharger outlets. Built from aluminized steel, the TRF-4625 offers corrosion resistance and strength for long-term service. Whether you’re repairing a cracked manifold flange or upgrading to improve exhaust integrity, this adapter simplifies installation and restores system performance. Offered by Wofford Truck Parts, it’s an effective fit for fleets and technicians seeking a high-quality replacement component.