{"product_id":"he-cosmostar-1-1-4-radiator-hose-barb-coupler-with-1-8-npt-steam-port-black-anodized-aluminum-for-ls-swap-cooling","title":"HE COSMOSTAR 1-1\/4\" Radiator Hose Barb Coupler with 1\/8\" NPT Steam Port — Black Anodized Aluminum for LS Swap Cooling","description":"\u003cp\u003e\u003cstrong\u003eThe HE COSMOSTAR 1-1\/4\" Radiator Hose Barb Coupler with 1\/8\" NPT steam port is an aluminum coolant crossover adapter that joins 1-1\/4\" radiator hoses and provides a dedicated steam\/bleed port for LS swap engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact anodized billet adapter is designed for LS family swaps and custom cooling setups where a reliable, top-of-system steam vent and a secure hose splice are needed. It fits standard 1-1\/4\" radiator hoses, incorporates a 1\/8\" NPT tapped port for steam vents or temperature sensors, and is finished in black to resist corrosion and wear. The unit is built for simple installation and long-term durability in high-heat engine bays.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this adapter integrate with an LS swap coolant system?\u003c\/h3\u003e\n\n\u003cp\u003eThe adapter creates a crossover or splice point in the upper radiator hose run and provides a 1\/8\" NPT port at the highest convenient location for venting air. It lets you mount a steam valve, bleeder, or small sensor without cutting additional fittings into the radiator or thermostat housing. The barb ends accept 1-1\/4\" hose and clamp down for a sealed connection.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e1-1\/4\" hose barb on both sides for direct splice of factory-style hoses.\u003c\/li\u003e\n  \u003cli\u003e1\/8\" NPT threaded port for steam vent, petcock, or temperature sensor.\u003c\/li\u003e\n  \u003cli\u003eBlack anodized CNC billet aluminum resists heat and corrosion.\u003c\/li\u003e\n  \u003cli\u003eCompact profile fits tight engine bays common with LS swaps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it hold up to high under-hood temperatures and vibration?\u003c\/h3\u003e\n\n\u003cp\u003eThis adapter is machined from billet aluminum and anodized for surface protection, offering strong thermal and mechanical stability compared with plastic fittings. The metal body tolerates repeated heating cycles and the anodized finish helps prevent surface corrosion and wear from clamp edges. Properly tightened hose clamps and correct hose fitment are essential to prevent leaks under vibration.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBillet aluminum core for thermal resilience and strength.\u003c\/li\u003e\n  \u003cli\u003eBlack anodize protects against corrosion and scratches.\u003c\/li\u003e\n  \u003cli\u003eBarbed design reduces hose slippage under vibration.\u003c\/li\u003e\n  \u003cli\u003eUse quality clamps and check torque after initial heat cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation for a DIY LS swap or coolant refresh?\u003c\/h3\u003e\n\npInstalling the coupler is straightforward and requires only basic hand tools: trim hose to length if needed, push the hose onto each barb, then secure with quality clamps. The threaded 1\/8\" NPT port allows the addition of a steam valve or bleeder without complicated routing. Most users complete the splice in minutes and then pressure-check the system after the first warm-up cycle.\n\n\u003cul\u003e\n  \u003cli\u003eNo specialty tools—cut hose, slide on, clamp, and thread in vent hardware.\u003c\/li\u003e\n  \u003cli\u003ePrepares a neat, high-point steam vent location for effective bleeding.\u003c\/li\u003e\n  \u003cli\u003eWorks with common LS swaps (LS1, LS3, LQ4, etc.) using 1-1\/4\" hoses.\u003c\/li\u003e\n  \u003cli\u003eMinimal clearance footprint for tight radiator hose routing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat accessories or parts should I pair with this coupler?\u003c\/h3\u003e\n\n\u003cp\u003eTo complete a reliable steam venting solution, pair the adapter with a 1\/8\" NPT steam petcock, auto-bleeder, or inline temperature sensor depending on your needs. Use high-quality stainless clamps and OEM-style radiator hose rated for coolant service. If your hoses are worn or undersized, replace them to ensure a leak-free installation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e1\/8\" NPT steam petcock or automatic bleeder valve.\u003c\/li\u003e\n  \u003cli\u003eStainless hex or worm-drive hose clamps sized for 1-1\/4\" hoses.\u003c\/li\u003e\n  \u003cli\u003eHeat- and coolant-rated radiator hoses (1-1\/4\" ID).\u003c\/li\u003e\n  \u003cli\u003eThread sealant suitable for NPT fittings (non-perm if you may service later).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This HE COSMOSTAR adapter is aimed at car builders, performance mechanics, and DIY enthusiasts performing LS-series engine swaps or custom cooling system work who need a durable, compact way to splice 1-1\/4\" radiator hoses and add a proper steam\/bleed point. If you require a metal, long-lasting hose splice with a dedicated 1\/8\" NPT port for venting or sensors, this part gives a clean, serviceable solution for street, track, or custom installations.\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: Does this fit all LS swap radiator hoses?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes if your hose ID is 1-1\/4\" this coupler is compatible with common LS1\/LS3\/LQ4 swap hoses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What size steam port does it accept?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It includes a 1\/8\" NPT threaded port for steam valves, petcocks, or small sensors.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"HE COSMOSTAR","offers":[{"title":"Default Title","offer_id":48085029683358,"sku":"B0F9F9X7N3","price":34.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/he-cosmostar-front-view-adapter.jpg?v=1785866964","url":"https:\/\/northtrailauto.ca\/products\/he-cosmostar-1-1-4-radiator-hose-barb-coupler-with-1-8-npt-steam-port-black-anodized-aluminum-for-ls-swap-cooling","provider":"North Trail Auto","version":"1.0","type":"link"}