Ford 5.4 and 6.8 Exhaust Manifold/Connector Plug for Egr Tube Billet CNC Machined Ford Exhaust Manifold Plug 97-99 Ford 5.4 and 6.8 and any others with 1-1/4 fitting. VERIFY: Thread size Aprox 1" Hex Size Aprox 1-1/4" (For easy measurement) Lifetime guarantee from Route66Mods