The old plastic fitting cracked and started leaking. Don’t have to worry about that anymore. Snug fit.

Cleaner connection than sliding the two hoses over each other.

Goof

If you are doing your fuel lines use these to transition from rubber to plastic.

The multi-diameter splice is a good product, and a decent solution to the plastic transition piece located on the firewall. That said, I believe a better solution is to run new fuel line from the supply tee to the fuel filter and bypass the hard line to fuel line transition that is located DIRECTLY ABOVE the starter. The fuel fitting was placed on the firewall only for the convenience of factory assembly. If you ever need to disconnect the fuel line from the engine it is as easy to remove it from the t-fitting as it is to remove it from the plastic firewall fitting. Same is true for the return line.