Replace the engine
Compare the exact assembly and supplied components. Send the original engine details for fitment confirmation before ordering.
See catalog assemblies →Engine family guide
Ram 2500 & 3500 6.4L HEMI Replacement & Rebuilt Engines
Keep your gas-powered Ram HD working. Compare 6.4L HEMI engine replacement, rebuilding your existing assembly and an installed repair for your identified 2500 or 3500.
Nationwide freight · East Texas installation · VIN verification before purchase
Your engine. Your next step.
Plan your Ram HEMI repair
Rebuild your engine
Have the existing engine inspected and the repair scope quoted. Include the diagnosis, intended use and any requested changes.
Request a rebuild quote →Plan installation
Get the engine, supporting repairs and installation itemized for your vehicle. Tell us where it is located if transport is needed.
Request installed repair →Confirm the truck and its equipment
Send the VIN, year, truck series, engine identification, transmission and 2WD/4WD configuration. Identify the gas HEMI specifically; a Cummins diesel repair follows a different engine and service path.
Prioritize the work the truck does
Describe daily mileage, towing or fleet use and the diagnosis. Ask for the engine assembly, supporting repairs, installation and transport to be itemized. Confirm the schedule with Big 3 before arranging a tow or planning the truck return to service.
Questions about this engine path
Can I choose a car HEMI for this truck?
Do not assume that shared displacement establishes fitment. Confirm the exact truck engine specification, transferred parts and controls with Big 3 before ordering an assembly or planning a conversion.
What happens to my old engine?
Confirm whether the selected offer requires exchange. A core must match the engine purchased and be rebuildable to qualify for credit. Freight and core terms are confirmed for the specific order.
Need help choosing? Call 903-262-9502 with your vehicle details. Review matching-core requirements and the product-specific warranty before ordering.
Before choosing a Ram HD 6.4L HEMI engine
1. Identify the application
Send the VIN, model year and actual engine identification; disclose any swap or modifications.
2. Plan the combination
Include the transmission, intended use, diagnosis and components you expect to reuse.
3. Confirm the scope
Confirm the assembly, core/exchange terms, freight or installation, schedule and written warranty.
Replacement or rebuild?
Compare the exact catalog assembly with a quote to rebuild your existing engine. Tell us whether you need a stock replacement or are planning upgrades. Price, availability, supplied parts and warranty depend on the selected product and confirmed work.
Discuss a rebuild of your engineEngine only or installed?
Big 3 supplies engines nationwide and offers installation at our East Texas facility. Ask for the engine, required installation parts, supporting repairs and delivery to be itemized. Multiple engines, transmissions or mixed freight items require a shipping quote.
Explore installation at Big 3Related engine and vehicle guides
These guides help narrow your inquiry. The options span different years and configurations; they are not an interchange chart or confirmation that an engine fits every vehicle shown.
A closer look at HEMI work
The details deserve a closer look.
These frames come from our own HEMI build videos: chamber work, the rotating assembly and the engine coming together. Tell us about your Dodge, Ram, Chrysler or Jeep to find the right starting point.
Have a project in mind?
Tell us what you drive and what you want to change.
Actual Big 3 shop projects shown. Photos illustrate different jobs and stages of work; included parts, fitment, finish and services are defined by your selected listing or written quote.
Current catalog options
These are catalog product-name matches, not a verified vehicle fitment list. Open the listing for the exact application, assembly, availability and written warranty. Product prices exclude separately quoted core deposits and order-specific charges.
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Questions before ordering
Does a catalog match confirm fitment?
No. Matching names or displacement only narrow the search. Big 3 needs the vehicle and engine identifiers to confirm the supplier listing, configuration and any required supporting work.
What is included in the displayed price?
The card displays the catalog product price. Open that same product for its details. Check whether the selected offer includes a refundable core deposit. Confirm any other core/exchange terms, freight, tax, installation and order-specific charges in your quote.
What warranty applies?
Use the selected product's written warranty and confirmed invoice terms. Stock replacements, customer-core rebuilds and performance packages may have different parts and labor coverage. A guide does not expand that coverage.
What if my engine is not listed here?
Product-name search can miss assemblies listed under an engine code or supplier number. Send your VIN and engine details for help; an empty search is not a statement that your engine cannot be supplied.
Parts and the work to install them
Need the engine or transmission installed?
Big 3 handles drivetrain installation and major repairs in East Texas, with general diagnosis and repair available by arrangement. Request a complete scope for your vehicle, supporting repairs and transport.