Why are you stuck on stainless? I ask myself what type of exhaust is on my two brand new OEM vehicles.....Yukon Denali XL, Dodge Ram 3500 Turbo Diesel, I'm pretty sure they are not using stainless steel. Some specialty vehicles are using stainless exhaust, but its more of a selling point for higher priced, higher profit vehicles. A KIA has aluminized exhaust and has a 100,000 mile bumper to bumper warranty.
Have you noticed how much vibration and movement your Viper engine produces and what that does to the more brittle stainless steel?
Have you heard the "tinny" sound that stainless steel produces? If you like it, thats OK.
What about the welds and finish of stainless products? Wouldn't it be nice to have a clean coated header that LOOKS GOOD for folks to see, or do we want to hide them behind the tin-foil shields after our investment?
And the big one..........Is it really stainless steel or just a low carbon steel that will eventually corrode? Look into it.
One final thought......when you purchase your headers and exhaust system and another Viper with a different header, like Belangers for example, out runs and/or out dyno's you, think about that stainless steel, smaller tube, 5 into 1 frame rubbing collector while you are scratching your head.
Just my sarcastic two cents. BTW, aluminized exhaust has helped my Viper run 9.60's at over 148 mph.
Tom