Looking for information and advice... Is there a specific bolt up 4in straight exhaust I could use for my 06 gmc savana 3500 ( non extended) . I was told 4 wouldn't.work and just to cut out converter and muffler and use stock size pipe...also looking into a possible programmer. Or a single tow...

Hey fellas! I just got my hands on a 1999 K2500 extended cab with a '97 engine, and I'm trying to learn the art of wrenching'. I have little mechanic experience and think that the 6.5 is a good place to start to learn. So I'm trying to install the 4" Diamond Eye exhaust and I also went for a...