{"product_id":"pro-series-chevy-big-block-cylinder-head-12-point-bolt-kit","title":"Pro Series Chevy Big Block Cylinder Head 12-Point Bolt Kit","description":"\u003cp\u003eUpgrade your engine build with the Top Street Performance Pro Series Big Block Chevy Cylinder Head 12-Point Bolt Kit. Designed for factory-style Chevrolet Big Block Mark IV cylinder head applications, this Big Block Chevy head bolt kit provides the clamping force and durability needed to help maintain reliable head gasket sealing in street, performance, marine, and racing engines. Whether you're rebuilding a 396, 402, 427, or 454 Big Block Chevy, these BBC cylinder head bolts provide dependable fastening performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReliable Cylinder Head Clamping Force\u003c\/strong\u003e\u003cbr\u003eDesigned to securely fasten cylinder heads to the engine block, this BBC head bolt kit helps maintain consistent cylinder head clamping force and dependable head gasket retention. Ideal for engine rebuilds, cylinder head replacement, and performance engine assembly projects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Strength Performance Construction\u003c\/strong\u003e\u003cbr\u003eManufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI, these Big Block Chevy cylinder head bolts are built to withstand demanding engine conditions. Threads are rolled after heat treatment and protected with a black oxide finish and oil coating for enhanced durability and corrosion resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for Original Big Block Chevy Cylinder Heads\u003c\/strong\u003e\u003cbr\u003eEngine-specific design provides compatibility with factory-style Chevrolet Big Block Mark IV cylinder head applications, including many 396, 402, 427, and 454 engine combinations. These BBC head bolts are ideal for stock replacement, engine rebuilds, cylinder head service, and performance applications requiring dependable cylinder head hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Rebuilds \u0026amp; Performance Engine Builds\u003c\/strong\u003e\u003cbr\u003ePerfect for cylinder head installation, head gasket replacement, engine assembly, and high-performance engine projects where fresh Big Block Chevy cylinder head hardware is recommended. An excellent choice for maintaining proper head gasket sealing and long-term reliability in naturally aspirated, marine, street performance, and racing applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET BIG BLOCK V8\u003cbr\u003e• 6.5L \/ 396 in³\u003cbr\u003e• 6.6L \/ 402 in³\u003cbr\u003e• 7.0L \/ 427 in³\u003cbr\u003e• 7.4L \/ 454 in³\u003cbr\u003e• 8.1L \/ 496 in³ stroker combinations (application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON USES\u003c\/strong\u003e\u003cbr\u003e• Big Block Chevy Engine Rebuilds\u003cbr\u003e• Cylinder Head Replacement\u003cbr\u003e• Head Gasket Service\u003cbr\u003e• Engine Assembly Projects\u003cbr\u003e• Street Performance Builds\u003cbr\u003e• Marine Engine Builds\u003cbr\u003e• Drag Racing Applications\u003cbr\u003e• High-Compression BBC Engines\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003cbr\u003e• Designed for factory-style Big Block Chevy cylinder head applications.\u003cbr\u003e• Verify cylinder head compatibility before ordering.\u003cbr\u003e• Not intended for Bowtie, Dart, Merlin, Pro Top, or World Products-specific applications requiring dedicated hardware.\u003cbr\u003e• Not compatible with Small Block Chevy, LS, or LT engine platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003cbr\u003eTorque: 4 steps, to 85 ft-lbs long, 75 ft-lbs short\u003cbr\u003eColor: Black\u003cbr\u003eFastener Style: Bolt\u003cbr\u003eGrade: Performance\u003cbr\u003eHead Style: 12-point\u003cbr\u003eMaterial: 35 Chromoly Steel\u003cbr\u003eQuantity: Sold as a kit\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818409402664,"sku":"722-82051","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/722-82051_01.jpg?v=1739475588","url":"https:\/\/www.topstreetperformance.com\/products\/pro-series-chevy-big-block-cylinder-head-12-point-bolt-kit","provider":"Top Street Performance","version":"1.0","type":"link"}