Mr. muffler meet Mr. Mid pipe. Mustang flowtubes are great sellers for the Mustang guys and girls that don't need a full Mustang cat-back, or just need an easy way to attach a custom exhaust.
Some call them starter tubes, some call them flow tubes. No matter what you call them, if you want to build your own custom exhaust, or repair a damaged or rusty existing Mustang exhaust system, these Mustang flow tube/starter tube kits are what you need to get started.