I had trouble getting the exhaust tunnel to fit the firewall. There was too much vertical height on the tunnel to match up to the firewall. I worked with Mark Goldberg, who sent another stainless steel tunnel, which fit better width-wise, but still had vertical height issues. We decided the problem was probably due to the fit of the flange, and Mark sent me another one which I bent to fit after removing the Avipro factory flange. After installing the flange, the tunnel fit perfectly!
