True... but I wasn't really talking about a motorcycle. I was referring to the photograph of the pipe/manifold assembly you posted. If you were holding it in your hand with the manifold on the right as it is in the photo, the return line is in front. As long as you're happy with the way you've got it connected then all is well and there's no longer any confusion.When speaking of front or rear it is usually describing the front of the bike or the rear of the bike. When talking about a V twin bike, you don't say the left or right cylinder because you're standing next to it. Apology accepted.