PDI Big Boss Compound Turbo Kit — Cummins X15/ISX (2010–2026)

Big Boss twin-turbo compound kit for 2010–2026 Cummins ISX15/X15. Supports 550–700hp — combine with the Big Boss tuner for maximum performance.

1-year unlimited-mileage warranty.

Genuine PDI parts supplied and installed by TDC Truck and Diesel.