5.7L / 6.1L / 6.4L Hemi Engine Upgrades

Performance Upgrades for 5.7L, 6.1L SRT8, and 6.4L 392 Hemi Engines

The 5.7L, 6.1L SRT8, and 6.4L 392 Hemi engines are cornerstone V8 platforms in the Mopar lineup, each offering unique strengths for performance enthusiasts. Whether you’re enhancing a daily driver or building a track-ready machine, these engines respond well to a variety of bolt-on and forced induction upgrades that improve power, torque, and reliability.

Why upgrade your intake and exhaust on 5.7L, 6.1L, and 6.4L Hemis?

Improving airflow is one of the most effective ways to unlock additional power on these Hemi engines. Upgrading cold air intakes, throttle bodies, and exhaust components reduces restrictions, allowing the engine to breathe more efficiently. This results in better throttle response, increased horsepower, and a more aggressive exhaust note.

• Cold air intakes optimize air density for improved combustion
• Long tube headers and cat-back exhausts reduce backpressure
• Throttle body upgrades enhance airflow at higher RPMs
• Improved exhaust flow supports future forced induction additions

Building a reliable foundation for forced induction on 6.1L and 6.4L Hemis

Both the 6.1L SRT8 and 6.4L 392 Hemis feature forged internals and robust rotating assemblies that can handle moderate boost levels with proper supporting modifications. Before adding a supercharger or procharger, it’s important to upgrade fuel delivery, cooling systems, and engine management to maintain reliability and maximize power gains.

Choosing the right upgrades for your 5.7L, 6.1L, or 6.4L Hemi build

Each Hemi engine has its own strengths and upgrade paths. The 5.7L is ideal for bolt-on improvements and mild tuning, while the 6.1L and 6.4L are better suited for more aggressive builds including forced induction. At FastHemis, you’ll find a full range of parts tailored to your engine’s specific needs, from intake and exhaust upgrades to supercharger kits and tuning solutions.