{"product_id":"wnseu-ls-throttle-body-bypass-hose-kit-steel-braided-crossover-for-gm-ls-engines-front-rear-install","title":"WnSEu LS Throttle Body Bypass Hose Kit — Steel‑Braided Crossover for GM LS Engines, Front\/Rear Install","description":"\u003cp\u003e\u003cstrong\u003eWnSEu's LS Throttle Body Bypass Hose Kit provides a complete, reusable coolant\/steam crossover solution for GM LS-series engines to route coolant between head ports without using intake manifolds.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit supplies the parts needed to connect the coolant\/steam ports on LS-series cylinder heads when your intake manifold doesn’t provide a built-in crossover passage. It’s designed for straightforward installation on either the front or rear of the heads, includes sealing hardware and a steel-braided hose, and works across the GM LS family of engines. Note: this kit is not compatible with FAST 102 intake manifolds, and thread sealant is not supplied.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit replace an intake manifold crossover?\u003c\/h3\u003e\n\u003cp\u003eThe kit gives you an external path for coolant to move between the cylinder head ports that an intake crossover would normally provide. This is useful when swapping manifolds, running aftermarket throttle bodies, or repairing a damaged internal passage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSupplies a steel-braided hose to bridge the two head ports.\u003c\/li\u003e\n  \u003cli\u003eIncludes two coolant port fittings and mounting bolts for secure attachment.\u003c\/li\u003e\n  \u003cli\u003eTwo O-rings ensure a reliable seal at each port when installed correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included and why they matter?\u003c\/h3\u003e\n\u003cp\u003eThe kit bundles the essential components so you don’t have to source fittings separately. Each item is selected to provide a durable, serviceable connection that resists vibration and engine bay heat.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo O-rings: create the primary seal between the fittings and head ports.\u003c\/li\u003e\n  \u003cli\u003eTwo bolts: fasten the fittings to the cylinder heads securely.\u003c\/li\u003e\n  \u003cli\u003eTwo coolant ports (fittings): threaded connectors that mate to the head openings.\u003c\/li\u003e\n  \u003cli\u003eOne steel-braided hose: flexible, abrasion-resistant bridge for coolant flow.\u003c\/li\u003e\n  \u003cli\u003ePTFE thread tape: helps seal the threaded joints during assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere can this kit be installed on the engine?\u003c\/h3\u003e\n\u003cp\u003eThe bypass hose kit is adaptable to either the front or rear pair of coolant\/steam ports on LS-series heads. That flexibility makes it suitable for many intake and throttle-body configurations where an internal crossover is absent or undesired.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFront or rear head installation capability depending on your manifold layout.\u003c\/li\u003e\n  \u003cli\u003eWorks with any GM LS-series engine family member for broad compatibility.\u003c\/li\u003e\n  \u003cli\u003eNot recommended for engines using FAST 102 style intake manifolds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I prepare and install the kit for best results?\u003c\/h3\u003e\n\u003cp\u003eClean the head port faces and verify thread engagement before assembly. Use the included PTFE tape on threaded joints and replace O-rings if damaged; keep thread sealant on-hand because it isn’t supplied with the kit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect and clean both head ports to remove old sealant or debris.\u003c\/li\u003e\n  \u003cli\u003eWrap threads with the supplied PTFE tape and install fittings hand-tight before torqueing to spec.\u003c\/li\u003e\n  \u003cli\u003eVerify O-ring seating and test for leaks after the engine reaches operating temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: This WnSEu LS Throttle Body Bypass Hose Kit is aimed at mechanics, engine builders, and LS swap enthusiasts who need a reliable external coolant crossover. It’s ideal when using aftermarket intakes or throttle bodies that remove the stock crossover, when replacing damaged internal passages, or when a quick, serviceable solution is preferred. If you plan to use a FAST 102 intake manifold or require factory internal passages, choose a different solution.\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: Is this kit compatible with every GM LS engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it fits all GM LS-series engines, but it won’t work with FAST 102 intake manifolds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include thread sealant?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No, PTFE tape is included but thread sealant is not supplied and should be sourced separately.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"WnSEu","offers":[{"title":"Default Title","offer_id":55166010589527,"sku":"B094NNWSZG","price":37.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/wnseu-front-packaging-ls-bypass-hose.jpg?v=1790361141","url":"https:\/\/britishgarage.co.uk\/products\/wnseu-ls-throttle-body-bypass-hose-kit-steel-braided-crossover-for-gm-ls-engines-front-rear-install","provider":"British Garage","version":"1.0","type":"link"}