5. To increase airflow into the Duramax air intake, Bully Dog developed a serious air intake system and filter, as well as RFI (Rapid Flow Induction). The RFI air cleaner and shroud also prevents air buffeting and hot-air buildup. Bully Dogs' 4-inch-diameter stainless steel exhaust system increases the exhaust gas volume, which exhausts with less restriction.
If You Can't Run With Bully Dog, Stay on the Porch