6L80E 6L90E LS Night Stalker 200 RPM Over Stock Lock Up GM Towing Torque Converter Part Number 4540HD

Night Stalker Series Torque Converter – GM Chevy LS 6L80E/6L90E (Part #4540HD)

Engineered for high-performance applications, this Night Stalker Series torque converter is the ultimate upgrade for your GM Chevy LS platform. Built with extreme duty components and a factory 12.5-inch core, this converter provides reliable power transfer matched with superior driving characteristics and exceptional durability for your application.

Product Specifications

• Series: Night Stalker Series
• Part Number: 4540HD
• Application Fitment: GM Chevy LS 6L80E / 6L90E GAS (For 2 Step Input Shaft)
• Stall Range: 200 – 300 RPM Added Stall
• Input Shaft: 35 Spline Input Shaft
• Stator: 36 Spline Modified Stator (Heavy Duty)
• Impeller Hub: Hardened Chrome Moly
• Bearings: Torrington Style Incased Bearings
• Lockup: Over Sized Extreme Duty Lock Up
• Crank Pilot: Factory 1.703 inch Pilot
• Bolt Size: 10MM X 1.5 Pitch Class 10 or Stronger
• Balance/Quality: Digitally Balanced, Leak & Pressure Tested, Quality Inspected at Every Step
• Design Features: No Anti-Balloon Plates, 4 Corner Tac Welded Fins or Furnace Brazed

Installation and Performance Notes

• Advertised stall ranges are based on specific vehicle setups and may vary depending on your application.
• Most vehicles benefit from adding additional gearing, especially when paired with taller tires.
• Use Dexron 6 transmission fluid for optimal performance and longevity.
• We recommend utilizing a Transmission Cooler for sustained high-performance operation.
• Apply Blue Loctite during assembly to ensure maximum seal integrity.

Performance Tuning Recommendations

• If you have upgraded two or more items (Intake, Heads, Headers, Exhaust, Camshaft, or Gearing), consider upgrading to our Street Bandit Series torque converter.
• For applications involving power adders such as Nitrous Oxide (NOS), Turbocharger(s), Supercharger, or Trans Brake, upgrade to the Out Law Series torque converter.

Building high performance and racing converters since 1970! We are a Veteran & Family-owned business dedicated to quality. Please contact us directly at 888-267-7464 with any further questions regarding your setup. Safety Warning: Products comply with P65warning.ca.gov requirements.