{"product_id":"4l80e-4l85e-ls-night-stalker-series-16-2-200-rpm-lock-up-gm-torque-converter-part-number-49491","title":"4L80E 4L85E LS Night Stalker Series 16-2,200 RPM Lock Up GM Torque Converter Part Number 49491","description":"\u003cp\u003e\u003c\/p\u003e\u003ch2\u003eNight Stalker Series Torque Converter - Fits GM Chevy LS 4L80E\/4L85E\u003c\/h2\u003e \u003cp\u003eAchieve peak performance and reliable shifting with our Night Stalker Series Torque Converter, specifically engineered for GM Chevy LS applications. This high-performance unit is designed to match factory specifications while offering extreme duty components necessary for modern muscle car builds. Restoring or upgrading your drivetrain with this digitally balanced, leak-and pressure tested unit ensures unmatched dependability and driveability.\u003c\/p\u003e \u003cp\u003eOur commitment to quality is evident in every detail, from the furnace brazed fins to the high-quality components used throughout. Trust our veteran and family-owned company, building performance since 1970, to deliver a converter built for the road or the race track.\u003c\/p\u003e \u003ch3\u003eProduct Specifications \u0026amp; Features\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eTransmission Application: GM Chevy LS (4L80E\/4L85E)\u003c\/li\u003e \u003cli\u003eSeries: Night Stalker Series\u003c\/li\u003e \u003cli\u003ePart Number: 49491\u003c\/li\u003e \u003cli\u003eStall Range: 1,600 – 2,200 RPM\u003c\/li\u003e \u003cli\u003eImpeller Hub: 2.5 inch Diameter (See accompanying diagram)\u003c\/li\u003e \u003cli\u003eCore Size: Factory 13 inch\u003c\/li\u003e \u003cli\u003eBolt Circle Diameter: Factory 11.675 inch\u003c\/li\u003e \u003cli\u003eInput Shaft: 35 Spline\u003c\/li\u003e \u003cli\u003eTorque Converter Components: Modified Extreme Duty Stator, Hardened Chrome Molly Impeller Hub, Torrington Style Incased Bearings\u003c\/li\u003e \u003cli\u003eConstruction: Oversized Extreme Duty Single Disk Lock Up, Tailored with Anti-Balloon Plates\u003c\/li\u003e \u003cli\u003ePilot Diameter: 1.703 inch Crank Pilot\u003c\/li\u003e \u003cli\u003eBolt Size Compatibility: 10mm X 1.5 Pitch (Requires Class 10.9 or stronger bolts)\u003c\/li\u003e \u003cli\u003eQuality Assurance: Digitally Balanced, Leak \u0026amp; Pressure Tested, Quality Inspections at Every Step\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eInstallation and Performance Notes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eStall ranges advertised are specific to a vehicle's unique setup; actual performance may vary. Please contact us for personalized installation advice regarding your specific vehicle configuration.\u003c\/li\u003e \u003cli\u003eThis application may require additional gearing, especially when fitted with taller tires, to achieve optimal performance and durability.\u003c\/li\u003e \u003cli\u003eFor best operational results and extended life of this unit, use Type F Transmission Fluid.\u003c\/li\u003e \u003cli\u003eWe recommend pairing this torque converter with a transmission cooler to manage heat and maintain peak performance during aggressive driving.\u003c\/li\u003e \u003cli\u003eEnsure all fasteners are secured using Blue Loctite for maximum vibration resistance.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eUpgrade Recommendations\u003c\/h3\u003e \u003cp\u003eWhile the Night Stalker is built to last, consider pairing it with our specialized series if you have upgraded components:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eStreet Bandit Series:\u003c\/strong\u003e Recommended if you have upgraded intake, headers, exhaust, or gearing.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOut Law Series:\u003c\/strong\u003e Recommended if your vehicle includes any power adders such as Nitrous Oxide (NOS), Turbocharger, Supercharger, or Trans Brake.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eBuilding high-performance and racing torque converters since 1970. We are a family-owned business dedicated to your success.\u003c\/p\u003e","brand":"Boss Hogg","offers":[{"title":"Default Title","offer_id":52064207470838,"sku":"49491","price":402.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0810\/7261\/9766\/files\/49490b-scaled-1_a00c0df0-c1c1-4c7d-b379-c146177e5177.png?v=1793210170","url":"https:\/\/bosshogtorqueconverters.com\/products\/4l80e-4l85e-ls-night-stalker-series-16-2-200-rpm-lock-up-gm-torque-converter-part-number-49491","provider":"Boss Hog Torque Converters","version":"1.0","type":"link"}