{"product_id":"pro-series-04-20-ls-cylinder-head-hex-bolt-kit","title":"Pro Series 04-20 LS Cylinder Head Hex Bolt Kit","description":"\u003cp\u003eUpgrade your LS engine build with the Top Street Performance Pro Series LS Cylinder Head Hex Bolt Kit. Designed for 2004-2020 GM Gen III and Gen IV LS applications, this LS cylinder head bolt kit provides the strength and clamping force needed to help maintain reliable head gasket sealing in street, performance, and racing engines. Whether you're assembling a fresh engine, replacing cylinder heads, or performing a rebuild, these LS 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 the cylinder heads to the engine block, this LS 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 LS cylinder head fasteners 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 2004-2020 LS Applications\u003c\/strong\u003e\u003cbr\u003eEngine-specific design provides compatibility with a wide range of Gen III and Gen IV LS engine combinations. These LS engine head bolts are ideal for stock replacement, engine rebuilds, cylinder head upgrades, and performance applications requiring reliable cylinder head hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Engine Rebuilds \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003ePerfect for cylinder head installation, head gasket replacement, engine assembly, and performance engine projects where fresh LS cylinder head hardware is recommended. A great choice for maintaining proper head gasket sealing and long-term engine reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES (2004-2020 CYLINDER HEAD APPLICATIONS)\u003cbr\u003e• 4.8L \/ 293 in³ (LY2)\u003cbr\u003e• 5.3L \/ 325 in³ (LM7, L59, LC9, LH6, LY5)\u003cbr\u003e• 6.0L \/ 364 in³ (LQ4, LQ9, LY6, L76, L96)\u003cbr\u003e• 6.2L \/ 376 in³ (LS3, L92, L99, L9H)\u003cbr\u003e• 7.0L \/ 427 in³ (LS7, application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Corvette \/ Camaro (LS equipped)\u003cbr\u003eChevrolet Silverado \/ GMC Sierra LS-based trucks\u003cbr\u003eChevrolet Tahoe \/ Suburban \/ GMC Yukon LS-based SUVs\u003cbr\u003ePontiac G8 \/ GTO and LS swap applications\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003cbr\u003eDesigned for 2004-2020 LS cylinder head bolt applications.\u003cbr\u003eVerify cylinder head casting and head bolt style before ordering.\u003cbr\u003eNot compatible with Gen V LT engines.\u003cbr\u003eNot compatible with Gen I Small Block Chevy or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003cbr\u003eTorque: 75 ft-lbs big, 25f ft-lbs small\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":49818410287400,"sku":"734-82079","price":118.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/734-82079_02.jpg?v=1743632211","url":"https:\/\/www.topstreetperformance.com\/products\/pro-series-04-20-ls-cylinder-head-hex-bolt-kit","provider":"Top Street Performance","version":"1.0","type":"link"}