You asked for it, and we listened! Khaos Motorsports is proud to release our catted down pipes for the 5.7L HEMI! We have gone above and beyond what is currently offered. We have taken the time to engineer our flange to fit the factory exhaust manifolds just like the original flanges. Made out of mandrel bent 3" aluminized steel, and designed to fit all exhaust diameters. We even made sure that our kit will fit not only stock exhaust systems, but aftermarket catback exhaust systems. All you have to do is select the correct outlet diameter to your current exhaust system. In addition, there is no tune needed, so no pesky check engine light! This part is CARB compliant .