I bought a stack real cheap off a buddy of mine and I'm trying to find a single stack kit but I'm not sure what to go with. I eventually want to replace everything from the turbo back but I only can get one piece at a time. I've yet to find a 5" single stack kit for my year truck. Is that because they don't make them or am I not looking hard enough. Also I found a kit which came with flex pipe but I'm not sure about using flex pipe although it is a hell of a lot cheaper.