I'm planning to retrofit a late-model LS engine into my 2002 Jeep 4x4, and want to fabricate my own exhaust headers. It needs to conform to California emissions standards. I don't want ugly "smog" ...

In a hidden warehouse on some farmland outside of metropolitan Detroit, a group of engineers from the oldest family in 4x4s assembled a secret project in an effort to bring a special product to market ...