Ontork 6.7 powerstroke studs are currently the only studs on the market that fit the 6.7 Fords properly. They fit precise and are the perfect lengths. Ontork studs are made of a proprietary SA4000 material rated to 268,000ksi. If you want the best studs on the market you found them. Ontork studs are manufactured in the USA and are made for diesels only.
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