JBA 03-06 Hummer H2 6.0L 409SS Single Rear Exit Cat-Back ExhaustBrand JBA Part Number 40 3023 Category Exhaust, Mufflers & Tips Catback Condition Brand New Original Manufacturer Packaging When it comes to performance exhaust systems, most people are looking for three things: Power. Sound. Quality. JBA Exhaust Systems deliver the best of all three. While there is high demand for performance and sound, the capacity for power in a JBA Exhaust System gives us the edge. Each system is tuned to provide the best possible