The 20-0434 Fuel Rail Plumbing Kit, Ford Coyote allows for an OEM bolt-on affair. It is compatible with ALL Coyote engines including the S197 Mustang GT, S550 Mustang GT, Shelby GT350, and the 2018+ Mustang GT (with direct injection). This kit eliminates any unnecessary fuel hoses that route over the top of the engine preheating the fuel. It plumbs the fuel rails starting from the SAE quick disconnect fitting upstream near the firewall. The rails are ran in parallel for even fuel distribution with the use of our high flowing billet aluminum Y-adapter fitting. All hoses are high quality PTFE compatible will all fuel types including E85. Billet aluminum O-ring plugs are included for all unused ports. Radium P/N: 14-0358 and Radium P/N: 14-0359 are included for the 2018+ Mustang GT and the Shelby GT350.