The newer style ones bolt right into that '99, You do need the fuel lines from the lift pump and to the injection pump, also the connector for WIF sensor and the heater changed. I did mine a little over 1 year ago. It's great, changes you to drop-in filter cartridge, makes bleeding after filter changes easier. For the connectors I managed to snip some of another harness, then just soldered and shrinkwrapped them into my harness in place of the old ones. I sure wish I could have landed a free one back then.