Granatelli Motor Sports 431000 Billet Thermostat Housing Trackhawk Durango 6.2L

Vehicle Fitment

• 2018-2021 Jeep Grand Cherokee Trackhawk (6.2L Supercharged HEMI V8)
• 2021-2025 Dodge Durango SRT Hellcat (6.2L Supercharged HEMI V8)
• 2021-2023 RAM 1500 TRX (6.2L Supercharged HEMI V8)

Fitment Notes

• Designed specifically for the 6.2L supercharged HEMI V8 platform shared across Jeep Trackhawk, Dodge Durango SRT Hellcat, and RAM TRX applications.
• Thermostat is NOT included - uses the OEM thermostat or a performance replacement thermostat purchased separately.
• No gasket is required - the machined mating surface seals directly against the engine block.
• Uses the factory exterior bolts to maintain OEM appearance and bolt torque specifications.
• 1/2-inch NPT pipe thread port can be plugged with a flush-mount pipe plug (not included) if no sensor is to be installed.
• This is the natural/silver anodized version. The black anodized version is available as part number 431000B.

Features

• CNC-machined from 6061-T6 billet aluminum - significantly stronger, more dimensionally precise, and more heat-resistant than the factory cast thermostat housing.
• Flush-mount bolt design eliminates the flow-restricting bridge casting found inside the OEM housing, delivering a confirmed 40% increase in coolant flow volume through the thermostat housing.
• Increased coolant flow reduces thermal stress on the thermostat spring, prolonging thermostat service life - a known weak point on the 6.2L supercharged HEMI platform under sustained high-output driving conditions.
• Integrated 1/2-inch NPT pipe thread port allows direct installation of an aftermarket coolant temperature sensor, pressure sensor, or coolant temperature gauge sender without additional fabrication.
• No gasket required - the precision-machined sealing surface interfaces directly with the engine block for a leak-free, no-prep installation.
• Retains factory exterior bolt pattern and OEM bolt sizes - maintains the stock engine bay appearance while delivering performance improvements underneath.
• Heater bypass provision ensures compatibility with the factory heater core circuit - no heater hose rerouting or system modification required.
• Natural anodized aluminum finish resists oxidation and corrosion in the engine bay environment while providing a clean, billet appearance.
• Installation is achievable with basic hand tools only - no specialty equipment required.
• Sold individually. Compatible with both OEM and aftermarket performance thermostats.

Specifications

• Part Number: 431000
• Brand: Granatelli Motor Sports
• Type: Billet Thermostat Housing
• Material: 6061-T6 billet aluminum
• Color/Finish: Natural (silver anodized)
• Coolant Flow Improvement: 40% increase over factory housing
• Sensor Port: 1/2-inch NPT pipe thread
• Thermostat Included: No
• Gasket Required: No
• Mounting Hardware: Yes (uses factory exterior bolts)
• Heater Bypass Provision: Yes
• Water Neck Inlet Size: Stock (OEM diameter)
• Installation: Basic hand tools only
• Weight: 1.0 lb
• UPC: 802735040227
• Sold: Individually

Included Components

• 1x Granatelli Motor Sports Billet Thermostat Housing - Natural (431000)
• 1x Mounting Hardware Kit

Product Description

The Granatelli Motor Sports 431000 is a CNC-machined billet thermostat housing engineered for the 6.2L supercharged HEMI V8 platform used in the Jeep Grand Cherokee Trackhawk, Dodge Durango SRT Hellcat, and RAM 1500 TRX. The factory thermostat housing on these vehicles contains an internal flow-restricting bridge casting that limits the volume of coolant that can pass through the housing - a design compromise inherited from the production casting process. The Granatelli unit removes this restriction entirely by utilizing flush-mounted internal bolts, resulting in a confirmed 40% increase in coolant flow volume through the housing. This increased flow reduces the thermal load on the thermostat spring, addressing a known durability concern on the 6.2L HEMI supercharged platform where sustained high-output driving creates above-normal thermal stress on cooling system components.

Machined from 6061-T6 aluminum, the housing is significantly stronger, more dimensionally stable, and more resistant to heat cycling than the factory die-cast housing. The precision-machined mating surface eliminates the need for a gasket - the housing seals directly against the engine block for a reliable, leak-free installation. A 1/2-inch NPT pipe thread port is machined into the housing, providing a direct mounting point for an aftermarket coolant temperature sensor, pressure sensor, or temperature gauge sender - eliminating the need for additional tee fittings or inline adapters in performance monitoring setups. The heater bypass provision maintains full compatibility with the factory heater core circuit, ensuring no modification to the cooling system's cabin heating function is required. Factory exterior bolt dimensions and torque specifications are retained throughout, preserving the OEM appearance and simplifying installation.

The 431000 is the natural/silver anodized version of this housing; a black anodized version is available as part number 431000B for those preferring a blacked-out engine bay aesthetic. The thermostat is not included - the housing is compatible with both the OEM thermostat and aftermarket high-flow performance thermostats. Installation requires only basic hand tools and no specialty equipment. Sold individually. For the 6.2L supercharged HEMI platform enthusiast looking for a straightforward, high-value cooling system upgrade that directly addresses a factory design limitation, the Granatelli 431000 billet thermostat housing is a practical and proven solution.