Modularheadshop is a high quality performance shop that specializes in Modular components for the Ford 4.6L and 5.4L engines. We have probably already built a dozen combinations similar to yours and know what works and what is not worth spending money on. We are very unique in that we both modify the heads, we also designed the largest number of camshafts available for these engines anywhere. In addition to offering Quality Cylinder Heads and Cylinder Head / Valve Train Parts, we also offer buil