Top Street Performance Pro Series Cylinder Head Hex Bolt Kit for 04-20 GM Chevy LS

TSP's fasteners are composed of 35 chromoly steel for a minimum tensile strength of 190,000 PSI. Threads are rolled after heat treatment and then tested for tensile and yield strength. All hardware is then given a black oxide finish and oil coating to protect from rust and corrosion.COMPATIBLE WITHGM LS SERIES V8 ENGINES - 2004–2020 STYLE 4.8L / 293 in³ (LY2) 5.3L / 325 in³ (LM7, L59, LC9, LH6, LY5) 6.0L / 364 in³ (LQ4, LQ9, LY6, L76, L96) 6.2L / 376 in³ (LS3, L92, L99, L9H) 7.0L / 427 in³ (LS7, application-specific verification required)COMMON VEHICLE APPLICATIONSChevrolet Corvette / Camaro (LS equipped)Chevrolet Silverado / GMC Sierra LS-based trucksChevrolet Tahoe / Suburban / GMC Yukon LS-based SUVsPontiac G8 / GTO and LS swap applicationsNOTESDesigned for 2004–2020 LS cylinder head fastener applications.Verify correct head bolt/stud style for your block, cylinder head casting, and model year.Not compatible with 1997–2003 LS applications unless specifically confirmed.Not compatible with Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.SPECIFICATIONSTorque: 75 ft-lbs big, 25f ft-lbs smallColor: BlackFastener Style: BoltGrade: PerformanceHead Style: HexMaterial: 35 Chromoly SteelQuantity: Sold as a kit

• Fits GM LS Gen III/IV applications; verify cathedral or rectangular port compatibility before ordering
• Bolt kit with Hex hardware and 35 Chromoly Steel construction for performance engine builds
• Provides strong, consistent clamping force to support head gasket sealing and cylinder pressure control
• Application-specific torque procedure listed in specs: 75 ft-lbs big, 25f ft-lbs small