In 2026, the 8.4L V10 engine from the Dodge Viper SRT-10 has moved from a “performance option” to a “collector’s asset.” Since Mopar officially discontinued the crate engine program for the V10 several years ago, the market is now dominated by high-end specialty shops, “New Old Stock” (NOS) units, and premium salvage pulls

Listing Details

• 8.4L V10
• Part #5038516AA
• For 2008-2010 Viper SRT-10
• Aluminum Block & Cylinder Heads
• Silver-Finished Intake Manifold
• Red-Finished Valve Covers
• Ancillary Components

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1. 2026 Availability & Market Pricing

Because these are no longer in mass production, “crate” now refers to either a rare unopened factory unit or a fully dressed, zero-mile remanufactured engine.

2. Technical Specifications (Gen 5 Spec)

If you are sourcing a 2026 “Crate” build, it is usually based on the Gen 5 (2013–2017) architecture, which is the most refined version.

• Displacement: 8.4 Liters (512 Cubic Inches)

• Horsepower: 645 hp @ 6,200 rpm

• Torque: 600 lb-ft @ 5,000 rpm

• Block: Aluminum with cast-iron liners

• Valvetrain: Overhead Valve (OHV), Variable Valve Timing (VVT) with “Cam-in-Cam” technology.

3. The “Coyote/LS Swap” Comparison (2026 Context)

By 2026, the Viper V10 is rarely chosen for budget builds. Compared to a Ford Coyote or a Chevy LS:

• The “Length” Problem: The 8.4L V10 is extremely long. It often requires moving the firewall back by 6–10 inches in standard engine bays.

• The “Weight” Factor: While aluminum, it is still a heavy unit (~600 lbs dressed).

• The Sound: In 2026, the primary reason for this swap is the unique, exotic “odd-fire” exhaust note that cannot be replicated by any V8.

4. 2026 Critical Sourcing Tips

• The Control Pack: Mopar discontinued the “Viper Engine Controller” kits. In 2026, most swaps use MoTeC M150 or AEM Infinity standalone ECUs. Budget an extra $4,000 – $6,000 for electronics and professional tuning.

• The Bearing Recall (Gen 5): If you are buying a used “pull” engine, verify the VIN for the R28/R29 bearing recall. Some 2013–2014 engines were shipped with debris in the block that caused catastrophic bearing failure.

• Dry Sump Conversion: For high-performance use, 2026 builders often convert these to dry sump systems, as the 8.4L is prone to oil starvation during sustained high-G cornering.

5. Where to Buy in 2026

• Viper Specialty Performance: One of the few shops still offering full, zero-mile builds.

• Cleveland Power & Performance: The industry leader for “driveline pallets” (Engine + Trans + Wiring).

• Prefix Corporation: The original engine builders for the Viper; they occasionally offer “legacy” engine services.