BUY NOW, PAY LATER. Starting at 0% APR 
The HEMI name is synonymous with American dominance. Whether you are piloting a 5.7L Eagle or a 6.4L Apache, you are sitting on a platform designed for raw power and uncompromising torque. However, even the best factory engineering has its limits. To truly unlock the potential of your Mopar, you need high-performance components that go beyond the assembly line.
At DTX Performance, we don't just sell parts; we provide the blueprint for automotive excellence. From solving notorious reliability issues to pushing triple-digit horsepower gains, this guide covers the essential Hemi performance parts every owner needs to build a legend.
Build Reliability: Eliminate the "HEMI Tick"
Before you chase horsepower, you must secure the foundation. The most common concern for HEMI owners is the dreaded "HEMI Tick." This isn't just an annoying sound: it is often the precursor to catastrophic engine failure.
The issue typically stems from two areas: the lifters and the oiling system. The factory needle bearings in the lifters can seize, flat-spotting the camshaft and sending metal shards throughout the engine. Furthermore, the Multi-Displacement System (MDS) adds complexity that often sacrifices long-term durability for marginal fuel economy.
Select High-Performance Lifters
If you are planning a cam swap or a high-mileage refresh, an MDS delete is mandatory. Replacing factory lifters with non-MDS performance lifters or Hellcat-spec lifters ensures your valvetrain can handle high RPMs without protest. This is the first step in ensuring your build survives the track and the street.
Push High-Volume Oiling
The 5.7L and 6.4L engines demand consistent oil pressure at the top end. Upgrading to a high-volume oil pump, such as a Melling unit, ensures that the lifters and cam bearings receive the lubrication they need, especially under high-load conditions.
Build Airflow: Breathe Life Into the Beast
Internal combustion is an air-pump game. The more air you can move in and out, the more power you make. Factory intake and exhaust systems are designed for silence and emissions compliance, often strangling the engine’s natural performance.
Select Long Tube Headers
When it comes to Hemi performance parts, nothing changes the character of the car like a set of long tube headers. Factory exhaust manifolds are restrictive "log" designs that trap heat and create backpressure.
- Power Gains: Long tube headers can provide 20–30 wheel horsepower when paired with a proper tune.
- The Sound: They provide that signature deep, aggressive growl that defines modern muscle.
- Precision Fit: Look for 1-7/8" primaries for naturally aspirated 5.7L builds, or 2" primaries if you are running a 6.4L or planning for forced induction.
Build Intake Velocity
The 6.4L HEMI comes with a fantastic "active" intake manifold from the factory. If you are running a 5.7L, one of the best budget-friendly performance mods is swapping to a 6.4L (SRT) intake manifold. This provides a significant boost in mid-range torque. Couple this with an 84mm or 90mm ported throttle body to sharpen throttle response and eliminate the "dead" feeling in the pedal.
Build Power: The Camshaft Evolution
The camshaft is the heart of your HEMI. It determines where the power sits in the RPM band and how the car behaves at idle. Because modern HEMIs utilize Variable Valve Timing (VVT), you need a cam specifically designed to work with this technology: or a limiter kit to keep everything in check.
- Stage 1 Cams: Perfect for daily drivers. You get a noticeable bump in power across the board with a slight lope at idle. No stall converter is usually required.
- Stage 2 Cams: The "sweet spot" for most enthusiasts. Significant top-end gains and a classic muscle car chop. Usually requires a 3000+ RPM stall converter in automatic cars.
- Stage 3 Cams: For the maximum effort N/A builds. These cams prioritize peak horsepower and require supporting mods like upgraded valve springs, pushrods, and high-stall converters.
Build Precision: Tuning and Electronics
You can bolt on every part in the catalog, but without a custom tune, you are leaving power on the table and risking your engine's health.
Since 2015, Chrysler has utilized locked PCMs. To install Hemi performance parts like cams or headers, you must first bypass this security. At DTX Performance, we recommend high-speed handheld tuners combined with a professional dyno or email tune. This allows you to:
- Adjust fuel and spark maps for 93 octane or E85.
- Disable MDS permanently.
- Recalibrate transmission shift points for crisper, faster gear changes.
- Monitor engine vitals in real-time.
Build Endurance: Cooling Systems
Heat is the enemy of performance. Whether you are drag racing or towing with a Ram 1500 HEMI, keeping coolant and oil temperatures stable is vital. High-performance builds generate significantly more heat than stock configurations.
For those running the HEMI platform in truck applications, cooling is even more critical due to the increased load. Upgrading to a heavy-duty radiator is a smart move for long-term reliability. For example, if you are running a Ram platform, consider a high-efficiency replacement like the CSF 13-19 Ram 1500 Radiator to ensure your system can handle the increased thermal demands of a modified engine.
Shop With Confidence at DTX Performance
The path to 500+ horsepower isn't found in a single part; it’s found in a calculated combination of high-quality components and expert knowledge. DTX Performance is committed to providing the modern muscle community with parts that deliver on their promises.
We understand that your vehicle is more than just transportation: it is a statement of power and precision. That is why we promise to only send you the best gear, tested and proven to perform.
Summary of Essential HEMI Upgrades:
- Reliability: MDS Delete, Hellcat Lifters, High-Volume Oil Pump.
- Airflow: Long Tube Headers, 6.4L Intake Swap, Ported Throttle Body.
- Valvetrain: VVT-Specific Performance Camshafts, Upgraded Springs.
- Control: Unlocked PCM and Custom Tuning.
- Thermal: High-Efficiency Radiators and Low-Temp Thermostats.
Ready to take your HEMI to the next level? Don't settle for mediocre performance. Select your vehicle and start building the machine you were meant to drive.
If you have questions about fitment or need a recommendation for your specific build goals, our team is ready to help. At DTX Performance, we don't just provide parts; we provide the power to dominate.
