{"product_id":"improved-racing-ls-engine-oil-cooler-bypass-cover-for-gen-iii-iv-small-block-no-sensor-ports-fkm-gasket","title":"Improved Racing LS Engine Oil Cooler Bypass Cover for Gen III\/IV Small-Block – No Sensor Ports, FKM Gasket","description":"\u003cp\u003e\u003cstrong\u003eThe Improved Racing Gen III \u0026amp; IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) permanently seals factory oil cooler openings and restores high-flow internal routing for LS small-block pans without an external cooler.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your GM Gen III or IV LS engine doesn’t use the stock oil cooler—or you’ve removed an external cooler—this billet bypass cover replaces the original diecast part to prevent leaks and improve oil circulation. Machined from durable material and supplied with a bonded high-temperature FKM rubber gasket and hardened fasteners, the cover is engineered to fit most LS-series small-block oil pans where the cooler ports are situated above the oil filter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this bypass cover restore reliable sealing on LS oil pans?\u003c\/h3\u003e\n\u003cp\u003eThe cover uses a precision-machined sealing surface with a bonded FKM rubber gasket that resists heat and oil degradation. That combination creates a leak-resistant joint without needing additional sealants, while the included class 10.9 mounting screws ensure consistent clamp load over repeated service intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAluminum-bonded high-temp FKM rubber gasket for durable sealing\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined flange for accurate fitment to pan ports\u003c\/li\u003e\n  \u003cli\u003eClass 10.9 hardened screws supplied for secure attachment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this cover affect oil flow compared with the original diecast bypass?\u003c\/h3\u003e\n\u003cp\u003eYes — the internal cavity is ported larger than the OE diecast cover to reduce flow restriction. By offering a less restrictive path, the cover helps preserve proper oil circulation in engines not using an external cooler, while maintaining pressure stability under normal operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLarge ported internal cavity minimizes flow bottlenecks\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for LS Gen III\/IV port geometry\u003c\/li\u003e\n  \u003cli\u003eMaintains OEM-style routing without added plumbing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich LS engines and oil pan layouts are compatible with this part?\u003c\/h3\u003e\n\u003cp\u003eThis bypass cover fits most GM Gen III and Gen IV LS-series small-block oil pans that have the oil cooler ports located above the oil filter. It is intended for installations where no external oil cooler or cooler sensor plumbing is present—the unit does not include sensor ports.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with many Gen III and Gen IV LS small-block pans\u003c\/li\u003e\n  \u003cli\u003eFor pans with cooler ports above the oil filter only\u003c\/li\u003e\n  \u003cli\u003eNot intended for pans requiring sensor ports or external cooler plumbing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow simple is installation, and what hardware is included?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: remove the factory cover, clean mating surfaces, place the bonded gasket and tighten the supplied screws to torque specs. The package includes the bypass cover, a pre-bonded FKM rubber gasket rated for high temperatures, and class 10.9 mounting screws for a reliable assembly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes pre-bonded aluminum\/FKM gasket—no additional sealant needed\u003c\/li\u003e\n  \u003cli\u003eClass 10.9 mounting screws included for consistent clamping force\u003c\/li\u003e\n  \u003cli\u003eBasic hand tools and torque wrench required for proper install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Improved Racing bypass cover is aimed at LS engine builders, swap installers, restomod shops, and performance enthusiasts who have removed the factory oil cooler or are running engines without external cooler plumbing. It’s suited for anyone wanting a robust, leak-resistant replacement to the OE diecast bypass cover that improves internal oil flow without adding complexity or sensor ports.\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 bypass cover include sensor ports?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This version has no sensor ports and is for applications without external cooler or sensor plumbing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is a gasket and screws included with the cover?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It ships with an aluminum-bonded high-temp FKM gasket and class 10.9 mounting screws.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Improved Racing","offers":[{"title":"Default Title","offer_id":48085620818078,"sku":"B0CZV1217Y","price":37.85,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/improved-racing-bypass-cover-front-view.jpg?v=1785874883","url":"https:\/\/northtrailauto.ca\/products\/improved-racing-ls-engine-oil-cooler-bypass-cover-for-gen-iii-iv-small-block-no-sensor-ports-fkm-gasket","provider":"North Trail Auto","version":"1.0","type":"link"}