They fit the 1998 Ford 5.4 engine. I bought another brand advertised as such and it didn't work for me. If you are building a Ford 2v 5.4 engine I recommend these headers but you should upgrade your gasket kit. You will most likely need to use one or two of the included screws instead of studs. You may also benefit from installing headers after the block is installed, they stick out more than the factory header and fitting this motor will be tricky anyway. I painted mine over the factory finish with Ceramic High Temp Exhaust Paint. I will update if this drawing method doesn't work.