{"product_id":"pro-series-97-03-ls-cylinder-head-hex-bolt-kit","title":"Pro Series 97-03 LS Cylinder Head Hex Bolt Kit","description":"\u003cp\u003eUpgrade your engine build with the Top Street Performance Pro Series 97-03 LS Cylinder Head Hex Bolt Kit. Designed specifically for early GM Gen III 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 LS1, replacing cylinder heads, or completing an engine rebuild, these 97-03 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 LS 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 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 1997-2003 Gen III LS Applications\u003c\/strong\u003e\u003cbr\u003eEngine-specific design provides compatibility with LS1, LS6, LR4, LM7, L59, LQ4, and LQ9 engine combinations utilizing the 1997-2003 cylinder head bolt configuration. These Gen III LS head bolts are ideal for stock replacement, engine rebuilds, cylinder head upgrades, and LS swap projects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Engine Rebuilds \u0026amp; Head Gasket Service\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. An excellent choice for maintaining proper head gasket sealing and long-term engine reliability in Gen III LS engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES - 1997–2003 STYLE\u003cbr\u003e• 4.8L \/ 293 in³ (LR4)\u003cbr\u003e• 5.3L \/ 325 in³ (LM7, L59)\u003cbr\u003e• 5.7L \/ 346 in³ (LS1, LS6)\u003cbr\u003e• 6.0L \/ 364 in³ (LQ4, LQ9)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Corvette \/ Camaro \/ Pontiac Firebird (1997–2003 LS equipped)\u003cbr\u003eGM Silverado \/ Sierra \/ Tahoe \/ Yukon (LS-based applications)\u003cbr\u003ePontiac GTO early LS swap applications\u003cbr\u003ePopular Gen III LS swap builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003cbr\u003e• Designed for 1997-2003 LS cylinder head fastener applications.\u003cbr\u003e• Not compatible with 2004-2020 LS cylinder head bolt applications.\u003cbr\u003e• Not compatible with Gen V LT engines.\u003cbr\u003e• Verify cylinder head casting and model year before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003cbr\u003eTorque: 75 ft-lbs big, 25 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":49818410254632,"sku":"734-82067","price":163.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/734-82067_02.jpg?v=1743632313","url":"https:\/\/www.topstreetperformance.com\/products\/pro-series-97-03-ls-cylinder-head-hex-bolt-kit","provider":"Top Street Performance","version":"1.0","type":"link"}