DPS Chummins compound turbo kit for your Chevy Cummins Swap. Make Chummins conversions run amazing! Our Chummins Compound turbos fit the heater AC box, and actually fit. When doing a 12V Cummins Swap Chevy, Cummins Swap Suburban, or any 5.9 or 6.7 Cummins Swap. It’s the only kit which will truly fit your conversion.