I dont know of any FI cleaner that attaches to the rail. What we use here is top engine cleaner #1050002 and use a pressurized tool to deliver it through the fuel rail. I've run a 16 ounce can of TEC with about 2 or 3 gallons of gas through the gas tank with marginal results. I have also found that running race gas periodically will also clean the injectors. You can also run the TEC straight into the engine by passing the injectors by running a piece of vacuum hose attached to the pipe for the vacuum source on the FPR and siphoning it straight from the can. And I have cleaned gummed up injectors by letting them soak in straight TEC for an hour or two too.