Purchase the header of your choice (if you want one), then run down to your local muffler shop, and have them run the pipes front to back for you. Depending on the hardware you select at the shop, you can have a complete custom exhaust system installed with labor for around the same price as buying a 'kit'. For the greatest savings at the shop, do not have a center muffler put in the system.
Most good shops will have a selection of mufflers that will allow you to have any type of sound you like, from silence, to Mustang Cobra, to just straight pipes.