Radium Engineering plumbing kit for its LS1, LS2, LS3, LS6, L76, and L99 fuel rails. It connects the rails while keeping the factory fuel-feed hose.
 
The inlet adapter accepts the factory SAE quick connector. A PTFE -8AN crossover joins the front of both rails, and supplied plugs seal the unused ports so the feed and crossover connections can be finished with the kit.
 
Includes a PTFE -8AN crossover hose, fuel-connection fittings, and unused-port plugs. Part 20-0232-PK.