{"product_id":"pro-series-chevy-small-block-4-bolt-large-journal-main-bolt-kit","title":"Pro Series Chevy Small Block 4-Bolt Large Journal Main Bolt Kit","description":"\u003cp\u003eStrengthen the foundation of your engine with the Top Street Performance Pro Series Chevy Small Block 4-Bolt Large Journal Main Bolt Kit. Designed for Chevrolet Gen I Small Block engines equipped with 4-bolt main caps and large journal crankshafts, this SBC main bolt kit provides the strength and clamping force needed to help maintain secure main bearing cap retention in street, performance, marine, and racing applications. Whether you're rebuilding a 327, 350, or 400 Small Block Chevy, these Small Block Chevy main bolts deliver dependable bottom-end fastening performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSecure Main Bearing Cap Retention\u003c\/strong\u003e\u003cbr\u003eDesigned to securely fasten the main bearing caps to the engine block, these SBC main cap bolts help maintain consistent clamping force and reliable crankshaft support. Ideal for engine rebuilds, rotating assembly service, and performance engine projects requiring dependable main cap fasteners.\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, this Small Block Chevy main bolt kit is built to withstand demanding engine conditions. Threads are rolled after heat treatment, tested for tensile and yield strength, 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 4-Bolt Large Journal SBC Engines\u003c\/strong\u003e\u003cbr\u003eEngine-specific design provides compatibility with Chevrolet Gen I Small Block engines utilizing 4-bolt main caps and large journal crankshaft configurations. These SBC main bearing cap bolts are ideal for stock replacement, engine rebuilds, marine applications, and performance engine builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Rebuilds \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003ePerfect for engine assembly, rotating assembly service, bottom-end rebuilds, and performance engine projects where fresh Small Block Chevy bottom-end hardware is recommended. An excellent choice for maintaining secure main cap retention in demanding environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN I (4-BOLT LARGE JOURNAL)\u003cbr\u003e• 5.4 L \/ 327 in³ (1968-Up Large Journal Applications)\u003cbr\u003e• 5.7 L \/ 350 in³ \u003cbr\u003e• 6.6 L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON USES\u003c\/strong\u003e\u003cbr\u003e• Small Block Chevy Engine Rebuilds\u003cbr\u003e• Bottom-End Refreshes\u003cbr\u003e• Main Bearing Service\u003cbr\u003e• Rotating Assembly Rebuilds\u003cbr\u003e• Street Performance Builds\u003cbr\u003e• Marine Engine Builds\u003cbr\u003e• Drag Racing Applications\u003cbr\u003e• Engine Assembly Projects\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003cbr\u003e• Designed for Gen I Small Block Chevy engines with 4-bolt main caps.\u003cbr\u003e• Designed for large journal Gen I Small Block Chevy applications.\u003cbr\u003e• Verify block and crankshaft configuration before ordering.\u003cbr\u003e• Not compatible with small journal SBC engines.\u003cbr\u003e• Not compatible with LS, LT, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003cbr\u003eTorque: 3 steps, to 75 ft-lbs inner, 70 ft-lbs outer\u003cbr\u003eColor: Black\u003cbr\u003eFastener Style: Bolt\u003cbr\u003eGrade: Performance\u003cbr\u003eHead Style: Hex\u003cbr\u003eMaterial: 35 Chromoly Steel\u003cbr\u003eQuantity: Sold as a kit\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818409042216,"sku":"719-13264","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/719-13264_01.jpg?v=1739477714","url":"https:\/\/www.topstreetperformance.com\/products\/pro-series-chevy-small-block-4-bolt-large-journal-main-bolt-kit","provider":"Top Street Performance","version":"1.0","type":"link"}