Nick has some pictures of the internal core of my early Contemporary mufflers. I was floored to see how incredibly small and restrictive they are. I can't imagine not making huge gains in horsepower with the new 3" core glasspacks from Classic Chambered. Nick, if you have time post a picture of my mufflers to show the Contemporary guys what they're choking their cars with. I can't believe that regardless of the engine you're running that you won't pick up over 50 HP with a very mild engine and over 100HP with a strong engine just by switching mufflers. The mufflers themselves are in the area of $200 with all the various pieces needed, then add on Nick's labor for cutting and welding, some shipping charges and possibly coating if you wish, and this replacement program is the most affordable horsepower bonanza available to the typical Cobra owner. Where else will you get the chance to add 100 HP or more for this kind of money? Show the pictures, Nick - they speak for themselves.