Mopar 6.2L H.O. HEMI Long Block – OEM Demon / Redeye / Super Stock Replacement
This Mopar 6.2L High Output (H.O.) HEMI Long Block is a factory OEM assembly designed for the most extreme production-based supercharged HEMI applications. Used in vehicles such as the Demon, Redeye, Super Stock, and Jailbreak platforms, this long block represents the strongest factory Gen 3 HEMI foundation Mopar has produced.
Whether you are replacing a damaged engine or starting a high-performance street, strip, or race build, this long block provides a proven OEM architecture capable of supporting serious horsepower when paired with the correct supporting components.
Key Features
- Genuine Mopar OEM 6.2L High Output HEMI long block
- Factory-installed forged rotating assembly components
- Designed for high-boost, supercharged applications
- Direct replacement architecture for Hellcat-based vehicles
- Proven durability in factory Demon, Redeye, Super Stock, and Jailbreak platforms
Engine Overview
- Displacement: 6.2 Liters (376 cubic inches)
- Configuration: V8, Supercharged HEMI
- Compression: 9.5:1
- Block Material: Cast iron Gen 3 HEMI block
- Rotating Assembly: Forged crankshaft, forged powder metal connecting rods, forged pistons
- Camshaft: 5150 alloy gun-drilled for high rpm
- Oil System: Factory-style lubrication system designed for high-output use
This long block is engineered by Mopar to withstand the elevated cylinder pressures and thermal demands associated with supercharged operation, making it an ideal foundation for both OEM replacement and performance-driven builds.
OE Applications & Fitment
- 2018 Challenger SRT Demon
- 2019–2023 Challenger / Charger SRT Hellcat Redeye
- 2021-2023 Challenger Super Stock
- 2022-2023 Challenger / Charger Jailbreak (6.2L)
Other Non-OE Applications & Fitment
- Dodge Challenger 2009+ R/T, 2011+ SRT & Scatpack, 2015+ Hellcat
- Dodge Charger 2009+ R/T, 2012+ SRT & Scatpack, 2015+ Hellcat
- Dodge Durango 2009+ R/T, 2018+ SRT, 2021+ Hellcat
- Chrysler 2009+ 300C, 2012+ SRT
- Jeep Grand Cherokee, 2012+ SRT8, 2018+ Trackhawk
- Jeep Wrangler 2021+ 392
- Ram 2009+ 5.7L, 2014+ 6.4L 1500, 2500, 3500, 4500, 5500, 2021+ TRX
- HEMI Swap & Restomods
Compatibility Note: The 6.2L Engines are considered "VVT" due to their variable valve timing system. All OEM vehicles with VVT HEMI's can utilize this engine with proper accompanying mods. Earlier non-VVT HEMI vehicles cannot accept this engine as a direct swap, to include all 2003-2008 5.7L and all 2006-2010 6.1L vehicles.
This engine is intended for vehicles originally equipped with the 6.2L H.O. Hellcat-based platform. If you’re replacing a damaged engine in a Demon, Redeye, Super Stock, or Jailbreak, the H.O. long block is the correct OEM-based replacement. Use in other non-OE vehicles requires additional vehicle-specific components, tuning, and calibration for proper installation.
6.2L H.O. HEMI vs Standard Hellcat Long Block
While both engines share the same 6.2L supercharged Gen 3 HEMI architecture, the High Output (H.O.) long block used in Demon, Redeye, Super Stock, and Jailbreak applications was engineered for more aggressive factory performance targets and higher sustained loads.
| Feature | Standard Hellcat Long Block | 6.2L H.O. Long Block (featured) |
|---|---|---|
| Factory Applications | Hellcat (non-H.O.) models | Demon, Redeye, Super Stock, Jailbreak |
| Intended Output Level | High performance street use | Maximum factory supercharged output |
| Rotating Assembly | Forged components | Forged components (H.O. spec) |
| Factory Calibration Strategy | Conservative boost and duty cycle | More aggressive factory boost strategy |
| Thermal & Load Tolerance | Designed for standard Hellcat duty cycles | Designed for higher sustained loads |
| Performance Headroom | Limited for extreme boost increases | Preferred foundation for higher-output builds |
Summary: The 6.2L H.O. long block is the factory choice for Mopar’s most extreme production supercharged vehicles. While both engines are forged and highly capable, the H.O. variant is the preferred starting point for customers seeking maximum factory-based performance or planning higher-output supercharged builds.
Intended Use & Build Orientation
OEM Replacement
- Direct OEM-style long block replacement for compatible vehicles
- Ideal for restoring factory performance when paired with stock supporting components
High-Performance Street & Strip Builds
- Strong factory foundation for upgraded intake, exhaust, and supercharger combinations
- Supports increased airflow and boost when paired with proper tuning and supporting mods
Race & Competition Builds
- Frequently used as a base for higher-horsepower supercharged combinations
- Common starting point for customers planning additional internal upgrades or increased boost
What’s Included
- Mopar OEM 6.2L H.O. HEMI long block assembly
What Is Not Included
- Supercharger assembly
- Intake system
- Exhaust manifolds or headers
- Oil Pan, Gasket & Pickup
- Fuel system components
- Accessory drive components
- ECU calibration or tuning
Recommended Supporting Upgrades
- Supercharger system: OEM or upgraded supercharger matched to your power goals
- Intake system: increased airflow to support higher boost and RPM
- Headers / exhaust: reduced backpressure for improved efficiency and power
- Professional tuning: required for proper operation and reliability
Important Notes
- This is a high-performance engine assembly and requires professional installation
- Additional supporting components are required for operation
- Power output depends heavily on supercharger configuration, fueling, exhaust, and tuning
Why Buy From HHP
- Extensive experience with Hellcat, Demon, Redeye, and Super Stock platforms
- Guidance on supercharger, intake, and exhaust combinations
- Support before and after purchase to ensure proper setup
If you are planning a replacement or a high-horsepower build and want to ensure this long block is paired with the correct supporting components, contact HHP before ordering and we’ll help guide your combination.
