I called Kooks a little while ago to see if they had a set of headers for the Viper. I heard they might be making them and I knew they had a big following with the LS1/Mustang crowd. Anyway, I talked to George R. and sure enough they just finished developing headers for the SRT-10. So I ordered a set. Here is a link to their site
Kooks Viper SRT-10 headers
Here is a pic of all the parts - 304 SS, 1 3/4" primaries, merge collector, v bands and flex pipes. this is the offroad version. I was suprised to see secondary o2 sensor bungs since this is an offroad version, but they will come in handy for wide band o2 sensors in the future. I also liked how the bungs are angled instead of straight in like the Belangers, that should make pinching and melting wires less of a problem.
Stock tubular manifold next to the new Kooks header
The collector
From 3500 all the way up there is a good 25 to 30 wheel horsepower gain from the headers alone. Same thing with the torque. Climate conditions were very similar on both dyno runs.
The sound has also changed for the better. Overall it sounds bigger/deeper. It's a bit more mellow at idle and cruising. It's a little louder than it was at WOT but it's not as earsplitting as it used to be and it sounds real good.
The install was pretty tough since these are one piece headers unlike the Belangers that are 3 piece. The engine has to be moved over a few inches each way to get the headers in and almost everything else in the engine compartment had to come out or be moved....I'm thinking the supercharger will be easier.