This Allstar Performance camshaft thrust button is machined from natural aluminum and measures 0.945in long. It is designed for Big Block Chevy engines.Spec Sheet: Allstar Spec SheetCompatibilityENGINE-SPECIFIC: Big Block Chevy.FAQ What length is the ALL90053 thrust button?The ALL90053 measures 0.945in long. What engine does the ALL90053 fit?The ALL90053 is designed for Big Block Chevy engines. What is the ALL90053 made from?The ALL90053 is machined from natural aluminum. Is the ALL90053 the roller cam version?No, the ALL90053 is the aluminum version for flat-tappet-style applications. The roller cam Big Block Chevy counterpart is the steel ALL90055. {"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "What length is the ALL90053 thrust button?", "acceptedAnswer": {"@type": "Answer", "text": "The ALL90053 measures 0.945in long."}}, {"@type": "Question", "name": "What engine does the ALL90053 fit?", "acceptedAnswer": {"@type": "Answer", "text": "The ALL90053 is designed for Big Block Chevy engines."}}, {"@type": "Question", "name": "What is the ALL90053 made from?", "acceptedAnswer": {"@type": "Answer", "text": "The ALL90053 is machined from natural aluminum."}}, {"@type": "Question", "name": "Is the ALL90053 the roller cam version?", "acceptedAnswer": {"@type": "Answer", "text": "No, the ALL90053 is the aluminum version for flat-tappet-style applications. The roller cam Big Block Chevy counterpart is the steel ALL90055."}}]}