Gibson T409 Stainless Exhaust System
Grand Cherokee with 3.7L V-6. The steel is not highly polished (except for the tip). T409 stainless steel is lower in chromium content than the T304 used by some other manufacturers. This keeps the price down. That said, the system is very easy to install. The 4" tip looks good. It gives my V-6 a nice "growl" no rumble. Improves throttle response slightly. I would not pay the extra again for the T409 stainless steel model.