{"product_id":"4l80e-4l85e-ls-night-stalker-series-200-rpm-over-stock-lock-up-gm-towing-torque-converter-part-number-4949hd","title":"4L80E 4L85E LS Night Stalker Series 200 RPM Over Stock Lock Up GM Towing Torque Converter Part Number 4949HD","description":"\u003cp\u003e\u003c\/p\u003e\u003ch2\u003eNight Stalker Series Torque Converter for GM Chevy LS Engines\u003c\/h2\u003e \u003cp\u003eUpgrade your drivetrain with our premium Night Stalker Series Torque Converter, specifically engineered for the GM Chevy LS platforms. This unit offers exceptional durability and performance, matched with a 200-300 RPM stall range (depending on vehicle setup), ensuring reliable power transfer whether you're running street drives or performance builds. Constructed with extreme duty components, this converter is built to handle the rigorous demands of high-performance modern engines.\u003c\/p\u003e \u003ch3\u003eProduct Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Fits GM Chevy LS Engines (Factory 13-inch Core Size)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Night Stalker Series (High Performance\/Extreme Duty)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 4949HD (LS 4L80E \/ 4L85E Conversion)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStall Range:\u003c\/strong\u003e 200 - 300 RPM (Dependent on vehicle configuration)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eImpeller Hub:\u003c\/strong\u003e Hardened Chrome Molly, 2.5 inch Impeller Hub\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Shaft:\u003c\/strong\u003e 35 Spline, optimized for the 2-step input shaft\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt Circle:\u003c\/strong\u003e Factory 11.675 inch (Supports 10mm X 1.5 Pitch bolts, Class 10.9 or stronger)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e Torrington Style Incased Bearings\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eKey Features:\u003c\/strong\u003e Modified Extreme Duty Stator, Oversized Extreme Duty Single Disk Lock Up, Anti-Balloon Plates, No-Leak\/Pressure Tested\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePilot Diameter:\u003c\/strong\u003e 1.703 inch Crank Pilot\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eCommitment to Quality\u003c\/h3\u003e \u003cp\u003eEvery torque converter undergoes rigorous quality inspections, including Leak \u0026amp; Pressure Testing and Digital Balancing. The construction features 4-Corner tac Welded Fins or Furnace Brazed connections, ensuring maximum strength and longevity.\u003c\/p\u003e \u003ch3\u003eApplication Notes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eAll advertised stall ranges are based on a specific vehicle's setup and may vary depending on your particular application. Contact us for personalized recommendations regarding optimal stall speeds.\u003c\/li\u003e \u003cli\u003eFor best operational results, use Type F Transmission Fluid.\u003c\/li\u003e \u003cli\u003eAlways install an additional transmission cooler to maintain optimal operating temperatures and protect your components.\u003c\/li\u003e \u003cli\u003eApply Blue Loctite during assembly for maximum security of hardware.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003ePerformance Recommendations\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eIf you have upgraded intake, headers, exhaust, or cam profiles, we recommend upgrading to our \"Street Bandit Series\" torque converter for a balanced fit.\u003c\/li\u003e \u003cli\u003eIf your application includes power adders (Nitrous, Turbocharger, Supercharger, or Trans Brake), consult our \"Out Law Series\" converters for maximum performance capacity.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eBuilt Since 1970:\u003c\/strong\u003e Our company has been building high-performance and racing converters for generations. We are a Veteran \u0026amp; Family Owned business dedicated to quality manufacturing in the USA.\u003c\/p\u003e \u003cp class=\"safety-warning\"\u003e\u003cstrong\u003eImportant Safety Notice:\u003c\/strong\u003e Please be aware that certain vehicles may require additional gearing, especially when running taller tires. Also note the warning regarding P65 exposure (Cancer and Reproductive Harm).\u003c\/p\u003e","brand":"Boss Hogg","offers":[{"title":"Default Title","offer_id":52064198131958,"sku":"4949HD","price":402.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0810\/7261\/9766\/files\/49490b-scaled-1_be8f0032-5190-4ce8-a8b2-980fe849f6cc.png?v=1793210147","url":"https:\/\/bosshogtorqueconverters.com\/products\/4l80e-4l85e-ls-night-stalker-series-200-rpm-over-stock-lock-up-gm-towing-torque-converter-part-number-4949hd","provider":"Boss Hog Torque Converters","version":"1.0","type":"link"}