{"product_id":"z-whip-stainless-steel-ls-header-manifold-bolt-kit-m8x25mm-12-hardened-304-ss-bolts-corrosion-resistant","title":"Z Whip Stainless Steel LS Header\/Manifold Bolt Kit M8x25mm — 12 Hardened 304 SS Bolts, Corrosion-Resistant","description":"\u003cp\u003e\u003cstrong\u003eZ Whip's Stainless Steel LS header\/exhaust manifold bolt kit is a set of 12 hardened 304 (18-8) M8x25mm bolts engineered to resist corrosion and tighten exhaust flanges on GM LS-series engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eUpgrading the fasteners that secure your exhaust manifolds or aftermarket headers improves long-term reliability and reduces the risk of rusted or snapped bolts during routine maintenance. These bolts are made from hardened 304 stainless steel and sized for direct fitment on a wide range of GM LS engines, offering a durable replacement for OEM hardware when you want corrosion resistance and consistent clamping force.\u003c\/p\u003e\n\n\u003ch3\u003eWill these bolts fit my LS engine?\u003c\/h3\u003e\n\u003cp\u003eYes — the kit is designed for broad compatibility across GM's LS family and many related variants. It replaces factory flange bolts where M8x25mm stainless hardware is required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with LS1, LS2, LS3, LS6, LS7, LS9, and LSX series engines.\u003c\/li\u003e\n  \u003cli\u003eFits Vortec 4.8L, 5.3L, 6.0L, 6.2L and other common GM V8s noted above.\u003c\/li\u003e\n  \u003cli\u003eWorks with OEM exhaust manifolds and most aftermarket headers that use M8 flange bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and corrosion-resistant are these bolts?\u003c\/h3\u003e\n\u003cp\u003eManufactured from hardened 304 (18-8) stainless steel, these bolts offer strong resistance to rust and typical automotive corrosion. The hardness treatment increases shear and clamp performance compared with soft stock hardware.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e304 stainless resists oxidation and road-salt corrosion better than standard steel.\u003c\/li\u003e\n  \u003cli\u003eHardened finish reduces likelihood of bolt stretching or failure under torque.\u003c\/li\u003e\n  \u003cli\u003eMeets industry mechanical expectations and is produced under certified manufacturing controls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat quality standards back these fasteners?\u003c\/h3\u003e\n\u003cp\u003eThese bolts are produced by a manufacturer with aerospace-level quality systems, bringing traceability and controlled processes into automotive fasteners. That means tighter tolerances and consistent material properties across the set.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eManufactured under AS9100D and ISO 9001:2015 certified processes.\u003c\/li\u003e\n  \u003cli\u003eParts produced with aerospace customers in mind, where reliability is critical.\u003c\/li\u003e\n  \u003cli\u003eDesigned to meet or exceed common ASME\/ANSI hardware standards for mechanical performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use and torque these bolts?\u003c\/h3\u003e\n\u003cp\u003eUse these bolts as direct replacements for manifold and header flange bolts that require M8x25mm length. Follow factory torque specs for your engine and consider anti-seize on threads where rework is likely to prevent galling.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall by hand first to avoid cross-threading, then torque to manufacturer-recommended values.\u003c\/li\u003e\n  \u003cli\u003eApply anti-seize or appropriate thread lubricant for repeated removal cycles.\u003c\/li\u003e\n  \u003cli\u003eReplace any damaged studs or hardware that show wear before reassembly for proper sealing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Z Whip Stainless Steel LS header\/exhaust manifold bolt kit is ideal for mechanics, restorers, and performance enthusiasts who want dependable, corrosion-resistant flange fasteners for GM LS-family engines. It suits anyone replacing rusted factory bolts, installing aftermarket headers, or seeking longer-lasting hardware that’s manufactured to industrial quality standards for consistent fit and performance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these bolts stainless steel?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the kit contains hardened 304 (18-8) stainless steel bolts that resist rust and corrosion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these bolts fit aftermarket headers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They fit most aftermarket headers that use M8x25mm flange bolts; always confirm your header's bolt size first.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Z Whip","offers":[{"title":"Default Title","offer_id":48084474200222,"sku":"B08N1LD6LX","price":30.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/z-whip-front-packaging-bolts.jpg?v=1785856606","url":"https:\/\/northtrailauto.ca\/products\/z-whip-stainless-steel-ls-header-manifold-bolt-kit-m8x25mm-12-hardened-304-ss-bolts-corrosion-resistant","provider":"North Trail Auto","version":"1.0","type":"link"}