4089754, 4036892, 4036900, 4036902. Turbo Model: HX55. for Cummins ISX1, ISX Signature 450 Non EGR Engine. Engine Code: for ISX1, ISX Signature 450. Billet Compressor Wheel: Forged billet aluminum CNC machined compressor wheel - High efficiency, fast response, lower fuel consumption, smooth operation.
