09/12/2026
This third-generation Hemi produces 345–395 horsepower at approximately 5,600 RPM and 375–410 lb-ft of torque near 4,000 RPM (depending on year and application), with a typical redline around 5,800 RPM. The deep-skirt cast-iron block, aluminum heads, dual spark plugs per cylinder, and Multi-Displacement System (MDS) combine strong low-end pull with highway efficiency. Real-world fuel economy often falls in the mid-teens to low-20s mpg combined in trucks and SUVs when MDS deactivates cylinders under light load.
Durability is a standout trait: well-maintained examples routinely exceed 200,000–300,000 miles with regular oil changes and basic care. The 545RFE five-speed automatic (common behind early 5.7 Hemis in Rams, Durangos, and Jeeps) provides solid ratios including overdrive, handling stock-to-mild power levels reliably when properly maintained.
This drop-in-ready setup shines in project builds such as classic Mopar muscle cars (Challenger, Charger, Road Runner restomods), older Ram 1500s needing a modern upgrade, Jeep Grand Cherokees or Commanders, and custom hot rods or street trucks seeking proven Hemi performance without complex fabrication. The included electronics and pedal simplify integration for a clean, driveable result.
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