{"product_id":"wnseu-mscrp-an4-fuel-brake-line-kit-for-ls-engines-stainless-coolant-crossover-steam-vent","title":"WnSEu MSCRP AN4 Fuel \u0026 Brake Line Kit for LS Engines - Stainless Coolant Crossover \u0026 Steam Vent","description":"\u003cp\u003e\u003cstrong\u003eWnSEu MSCRP AN4 Fuel Brake Line LS Stainless Coolant Crossover Steam Vent Kit is a tailored hardware set that routes AN4 fuel and brake lines and provides a stainless coolant crossover and steam vent solution for many LS-series engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit groups multiple hardwearing components designed for GM LS-family motors (LS1, LS2, LS3, LS6, LS7, LS9, LSX) to simplify plumbing upgrades during engine swaps or performance builds. Constructed from stainless steel and aluminum alloy, the pieces are finished for corrosion resistance and compatibility with AN4 fittings. Some vehicle variations exist; confirm fitment with your installer before buying.\u003c\/p\u003e\n\n\u003ch3\u003eWhat problems does this kit solve when installing an LS engine?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit organizes fuel and brake line routing while adding a coolant crossover and steam vent path that helps prevent trapped air in the cooling system. It reduces the number of custom-fabricated parts you need, saving time and helping achieve cleaner engine-bay plumbing. Designed for performance or restoration projects, it supports AN4 connections common in aftermarket setups.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eProvides pre-formed lines and fittings for AN4 fuel and brake plumbing.\u003c\/li\u003e\n  \u003cli\u003eIncludes a stainless coolant crossover to connect coolant passages across the engine.\u003c\/li\u003e\n  \u003cli\u003eAdds a steam vent to help evacuate air pockets during fill and bleed.\u003c\/li\u003e\n  \u003cli\u003eMinimizes cutting, bending, and custom fabrication at the shop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and corrosion-resistant are the materials?\u003c\/h3\u003e\n\n\u003cp\u003eParts are manufactured from stainless steel and aluminum alloy chosen for strength and resistance to rust. That combination balances weight and longevity for under-hood use where heat and fluids are present. Proper installation and use of compatible hoses and fittings will maximize lifecycle performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eStainless-steel components resist oxidation and maintain thread integrity.\u003c\/li\u003e\n  \u003cli\u003eAluminum alloy pieces reduce weight while resisting corrosion.\u003c\/li\u003e\n  \u003cli\u003eFinished surfaces compatible with AN-style fittings and hoses.\u003c\/li\u003e\n  \u003cli\u003eRecommended for professional fitment to ensure sealing and routing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich LS engines and vehicle setups are compatible?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit lists broad compatibility with LS1, LS2, LS3, LS6, LS7, LS9 and LSX platforms, but not every application is identical. Differences in accessory drive, intake choice, and chassis clearance can affect fit. Verify with your installer and compare part geometry to your engine and vehicle to ensure correct placement and clearance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIntended for popular LS-series engines with AN4 plumbing preferences.\u003c\/li\u003e\n  \u003cli\u003eSome models may require modification—consult installation personnel.\u003c\/li\u003e\n  \u003cli\u003eWorks well with common aftermarket intake and accessory configurations.\u003c\/li\u003e\n  \u003cli\u003eNot a guaranteed direct-fit for every chassis; fit check advised.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about installation and maintenance?\u003c\/h3\u003e\n\n\u003cp\u003eProfessional installation is recommended to ensure leak-free connections and proper routing away from heat sources and moving parts. Use appropriate AN4 hoses, torque fittings to spec, and pressure-test fuel and coolant circuits before regular operation. Routine visual checks help detect loosening or wear from vibration and heat cycling.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHave an experienced technician perform the install for safety and reliability.\u003c\/li\u003e\n  \u003cli\u003eUse correct AN4 hoses, clamps, and sealing practices during assembly.\u003c\/li\u003e\n  \u003cli\u003ePressure-check fuel and coolant systems before road use.\u003c\/li\u003e\n  \u003cli\u003eInspect fittings periodically for tightness and corrosion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Enthusiasts and mechanics completing LS engine swaps, performance builders upgrading fuel or brake plumbing to AN4 standards, and restorers wanting a tidy coolant crossover and steam vent solution. If you prefer off-the-shelf components to reduce fabrication time and want durable stainless\/aluminum parts, this kit is aimed at your workflow—just confirm fitment for your specific engine and vehicle combination before purchasing.\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: Will this kit fit my LS engine without modification?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit fits many LS variants (LS1\/LS2\/LS3\/LS6\/LS7\/LS9\/LSX) but some models vary; confirm fitment with your installer before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install this myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Professional installation is recommended to ensure leak-free AN4 connections and correct routing; experienced DIYers may install if they have proper tools and knowledge.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"WnSEu","offers":[{"title":"Default Title","offer_id":48083271254174,"sku":"B0CJ94XNF1","price":54.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/wnseu-mscrp-an4-front-packaging.jpg?v=1785830362","url":"https:\/\/northtrailauto.ca\/products\/wnseu-mscrp-an4-fuel-brake-line-kit-for-ls-engines-stainless-coolant-crossover-steam-vent","provider":"North Trail Auto","version":"1.0","type":"link"}