I have some of the ones Stroker has. However, whenever I decide to redo my exhaust, I will be getting rid of them. Cool idea, but becomes a pain to take on/off if you just want to make some noise on a street car. Open headers are great for a car like Strokers, but the average street car will gain more from a better designed exhaust. Also, when they are capped, they are a horrible exhaust restriction...like a dam to flow.