Beats stock and the competition. New over - sized filter element protects engine and outflows competition. Enclosed housing keeps out hot, power - robbing engine air. Reduces soot output, decreasing the frequency between regens. Add an additional 20 hp to your 2017 - 2019 Duramax. Or, combine with the Derringer inline tuner for a total gain of 81 hp. Beats stock and the competition. New over - sized filter element, largest in its class, protects engine and outflows competition. Enclosed housing keeps out hot, power - robbing engine air. More airflow increases the air - fuel ratio allowing the engine to run more lean, reducing soot output, decreasing the frequency between regens. US Patent 10,138,851 B2