I haven't seen any for the 2.5, but there is an alternative. It's not real expensive and not very hard, and when you are finished you have at least bragging rights. It's build your own headers, all the tubing can be bought prebent with mandrel bends, and in nearly any angle. The collector is pre assembled and it's not real hard. I have done this on Dirt Stockers. And the best part is you can save a Dollar doing it. And it