hey foxysandchick, the wife's got the same Z400 as you, color & all. I found that Alba racing has a complete kit (full pipe/jet kit including needles, pilots, & mains, max flo adapter & K&N filter w/Outerwear) all for cheap. That's the exact system that's gonna go on her bike. Check it out for yourself...albaaction.com You'll be hard pressed to find just a full pipe at their price.