Matches top Y perfectly. No problem. The hardest part was removing the old one. However, the claim that it fits both top and bottom is not true. The smaller port was too small. The old hose is simply pushed in and falls out without resistance. The clamp that came with it didn't fit this old hose which meant I couldn't get a good seal. The connection to the motor did not fit either. This port is too big. I couldn't put the tube on my lip. When I held the Y-pipe next to the old fitting, it was clear that the connection sizes were different.