I have a straight through system for a Polo 6n2. This was on my 1.4 tdi. It connects to the cat (or de-cat) and is stainless straight through all the way. There is a nice hidden backbox with no mufflers or anything in either!
I could certainly feel the difference having this on the car. It felt more responsive and a bit more enthusiastic.
This fits perfectly and didn't catch or rattle at all. Fits perfectly on all the original hangings.
SOLD!