Bully Dog has recently teamed up with HPC, a leader in the pro drag-racing circuit and aerospace industry, to bring you their all-new Rapid Flow 4-inch Ceramic-Coated Turbo-Back Exhaust for the 6.6L GM Duramax. Ceramic-coated exhaust systems are fairly new to the diesel market but have quickly proven to be extremely beneficial in high-temperature situations, where diesel trucks live. The coating creates a highly-smooth surface that has very high-level insulating qualities, resulting in some of the highest level of EGT's in the industry. Bully Dog considers this a good thing, because the new coating helps keep all that hot air through the walls of the exhaust focusing the heat into a fast moving stream of air from the turbo to the tail pipe. The hot air is trapped inside the exhaust and shot through the end while the exterior of the exhaust system remains relatively cool due to the insulating properties of the coating.
A few other ceramic coating features include:
1. Increased laminar airflow through the entire exhaust
2. Superior corrosion protection
3. Temperature protection from metal temperature range of -375 up to 1300 degrees F
4. Eliminates thermal fatigue and oxidation
5. Limited lifetime warranty against subsurface corrosion
6. Reduces carbon buildup
7. Surface finish will not discolor like stainless or chrome
8. Coating is weldable
The new system is available for the Ford Powerstroke, Dodge Cummins and GM Duramax engines varying in year. A 5-inch ceramic-coated option is available for vehicles with DPF (Diesel Particulate Filter). That big ceramic tip that finishes off the exhaust is available in 4-, 5- and 6-inch sizes.