Custom machined inlet flow guide fits Dodge/Mopar 2003-2008 casting #53021616 BA Gen 3 hemi 5.7L stock heads. Material is plastic 3/4″ thick black satin finish inlet opening 1.515″ x 1.835″ with 1/2 radius, mounting hardware included. Discard the clay and improve your repeatability in flow testing with a machined IFG.