Yeah, they break. What's so bad is, they can do both. Only ONE company makes one piece plugs for those applications........and guess what? Ford didn't use them!!!!!!! They used Motorcraft. Champion is the only company that makes a one piece plug for those. All the others are a two piece design and that's where they break. Where the two pieces are put together. The three valve Triton is a total POS design. Ford knew it when they produced it.
Now, if it's a two valve motor, it's a good one. They don't have the plug troubles the three valve motors do. The three valve motors are the world's biggest POS.
