Click to zoom in
Eliminate Coolant Leaks Before They Start with a Billet Thermostat Housing
The Billet Technology 300724 Billet Aluminum Thermostat Housing replaces the factory OEM thermostat housing with a precision CNC-machined billet aluminum housing on your 2021-2023 Dodge Durango SRT Hellcat. The factory thermostat housing on these high-output 6.2L Hellcat supercharged HEMI engines is a known weak point that warps and develops coolant seepage under the repeated thermal cycling of hard driving. The 300724 is CNC machined in Lake Worth, Florida from solid 6061-T6 certified domestic aircraft-grade aluminum, delivering a permanent solution that also adds a premium machined appearance to the engine bay. Direct bolt-in fit, OEM gasket compatible, no modifications required.
Key Features
- Precision CNC machined from solid 6061-T6 certified domestic aircraft-grade aluminum
- Engineered as a direct replacement for the factory thermostat housing on the 6.2L Hellcat supercharged HEMI
- Eliminates the OEM plastic or cast iron thermostat housing that is prone to warping, cracking, and coolant seepage under high operating temperatures
- Machined coolant passage geometry matches OEM flow characteristics
- Available in satin and color anodized finish options
- Billet Technology 300724 is backed by a limited lifetime warranty against defects in materials and workmanship
- Made in the USA
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2021 | Dodge | Durango | SRT Hellcat |
| 2021-2026 | Dodge | Durango | SRT Hellcat |
Specifications
| Detail | Value |
|---|---|
| Part Number | 300724 |
| Brand | Billet Technology |
| Material | Solid 6061-T6 Aircraft-Grade Aluminum |
| Finish | Satin (Raw Machined Aluminum) |
| Product Type | Thermostat Housing |
| Engine Compatibility | 6.2L Hellcat supercharged HEMI |
| Country of Origin | USA |
| Warranty | Limited Lifetime Warranty Against Defects In Materials And Workmanship |
What Is Included
- 1x Billet Technology 300724 Billet Aluminum Thermostat Housing
- Gasket set (verify on product page , select versions include gasket)
- Installation hardware
Frequently Asked Questions
Does the Billet Technology 300724 thermostat housing require a new thermostat?
The 300724 accepts the OEM thermostat. You can reuse your existing thermostat or install a new OEM-spec thermostat at the time of installation. Refer to the factory service manual for the correct thermostat specification.
Does the billet thermostat housing use OEM gaskets?
Yes. The this product is machined to accept OEM gaskets or an OEM-equivalent gasket set. Use a fresh gasket at installation. Some kits include a gasket , refer to the What Is Included section.
Will the billet thermostat housing improve cooling performance?
The this product is a direct replacement with matched coolant passage geometry. While it does not alter thermostat opening temperature, eliminating the factory housing material's tendency to warp ensures consistent thermostat seating and coolant flow.
Is the this product compatible with OEM and aftermarket coolants?
6061-T6 aluminum is compatible with standard ethylene glycol and OAT-based coolants. Do not mix coolant types. Flush the system if switching coolant formulas.
Does this thermostat housing fit both the Charger and Challenger?
Both vehicles share the same engine family. Refer to the fitment table for exact year and model compatibility.
What torque specification should I use for the thermostat housing bolts?
Torque fasteners to the OEM specification listed in the factory service manual for the 6.2L Hellcat supercharged HEMI. Over-torquing can crack the housing flange.
Is the Billet Technology thermostat housing made in the USA?
Yes. The this product is CNC machined in Lake Worth, Florida from certified domestic 6061-T6 aluminum.
Do I need to bleed the cooling system after replacing the thermostat housing?
Yes. Any time the cooling system is opened, air pockets can form. Fill the system, run the engine to operating temperature, check for leaks, and top off the coolant level after the thermostat opens.
Installation Instructions
- Allow the engine to cool completely. Never work on a hot cooling system.
- Place a drain pan under the vehicle and drain the coolant by loosening the lower radiator hose or drain petcock.
- Disconnect the radiator hose, heater hose, and any other coolant lines attached to the factory housing.
- Remove the OEM fasteners securing the factory thermostat housing.
- Remove the factory housing and thermostat. Clean the mating surface thoroughly.
- Install a fresh gasket on the Billet Technology this product billet housing.
- If reusing the OEM thermostat, verify it is in good condition. Install the thermostat into the billet housing.
- Mount the 300724 to the engine block mating surface and torque fasteners to OEM specification.
- Reconnect all coolant hoses and secure with OEM-style clamps.
- Fill the cooling system with the correct coolant type and bleed all air from the circuit.
- Start the engine, bring to operating temperature, and check for leaks.
- Top off coolant level after the thermostat opens and recheck after first heat cycle.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
Billet Technology
Billet Technology engine bay parts and accessories for Dodge Charger, Challenger, Durango, Chrysler 300, Ram 1500, Jeep Grand Cherokee, Trackhawk, TRX and Hellcat platforms are stocked at Black Ops Auto Works. Shop billet aluminum oil caps, coolant caps, washer fluid caps, brake fluid caps, radiator cap covers, catch cans, fuse box covers, thermostat housings, water necks, hood prop covers and power steering caps. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 71 Billet Technology SKUs with real fitment data and clear product specifications. What This Billet Technology Collection Covers Billet Technology creates CNC machined aluminum accessories that give Mopar and Ram engine bays a coordinated finish while retaining application specific fitment. The collection includes functional oil catch cans and cooling components alongside detailed cap covers, handles, and dress up pieces ...
View Billet Technology Products
Cooling
Cooling system parts and accessories for HEMI, Hellcat, Trackhawk, Duramax, Cummins, and import performance builds are stocked at Black Ops Auto Works. Shop radiators, thermostats, thermostat housings, water pumps, coolant reservoirs, expansion tanks, radiator hoses, oil coolers, transmission coolers, fans and shrouds, and thermal wrap for street, track, towing, and diesel platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 2116 Cooling SKUs across radiator, thermostat, water pump, hose, and heat management categories. What This Category Covers The Cooling category groups together every part that keeps engine, transmission, and charge air temperatures in check under real driving load. Coverage spans aluminum performance radiators, billet thermostat housings, high flow water pumps, silicone radiator hose kits, coolant reservoirs and expansion tanks, oil and transmission co...
View Cooling Products
Engine
Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...
View Engine Products
Thermostat Housings
Welcome to our exclusive Thermostat Housings collection! Here, you'll find a wide range of products designed to keep your thermostat protected and functioning optimally. Why Choose Our Thermostat Housings? Durability: Crafted from high-quality materials to withstand various environmental conditions. Compatibility: Designed to fit most standard thermostat models. Easy Installation: User-friendly designs that allow for quick and hassle-free setup. Stylish Options: Available in various styles and colors to complement your home decor. Shop Our Top Picks Browse through our top-rated thermostat housings: Premium Thermostat Housing Eco-Friendly Thermostat Housing Smart Thermostat Housing Designer Thermostat Housing Get Started Today! Upgrade your heating and cooling system with our Thermostat Housings. Shop now and experience quality and efficiency like never before!
View Thermostat Housings Products