The 2020–2024 Ford Explorer ST rolls off the factory line with a twin-turbocharged 3.0L EcoBoost V6 delivering 400 horsepower and 415 lb-ft of torque. That’s impressive for a 3-row SUV, but Ford’s factory calibration leaves significant untapped performance on the table. Between restrictive intake and exhaust components, an undersized intercooler, and conservative ECU mapping, the ST is built to satisfy emissions and comfort targets—not maximum output.
This is where aftermarket performance parts make the difference. At Lethal Performance, we provide proven upgrades—cold air intakes, intercoolers, downpipes, cat-back exhausts, fueling solutions, suspension components, and custom tuning packages—that transform the Explorer ST from a capable SUV into a high-performance machine.
Ford engineered the ST to balance performance with efficiency and drivability. The result is a platform that feels strong out of the box, but quickly shows its limits under spirited driving. Common stock limitations include:
Restricted airflow from the OEM intake and exhaust system
Heat soak from a small factory intercooler that struggles with repeated pulls
Conservative ECU calibration that caps boost pressure and timing for reliability margins
Soft suspension bushings that allow excess drivetrain movement and wheel hop
With the right modifications, you can solve these bottlenecks, unlock horsepower, and sharpen the SUV’s handling dynamics.
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Custom Tuning: The biggest performance unlock for the Explorer ST comes from ECU recalibration. Devices like the RTD4 or handheld tuners allow professional tuners such as ZFG Racing, Livernois Motorsports, and 5 Star Tuning to optimize boost pressure, ignition timing, fueling, and shift strategies. This is essential for maximizing the effectiveness of hardware upgrades.
Intercoolers: The stock intercooler is undersized for sustained performance. Aftermarket cores provide over 200% more volume, drastically reduce intake temperatures, and keep horsepower consistent under repeated acceleration or heavy load.
Exhaust & Downpipes: Factory exhaust components restrict airflow and muffle turbo response. High-flow downpipes and performance exhaust systems reduce backpressure, improve turbo spool, and produce a more aggressive exhaust note that matches the SUV’s performance.
Intake Systems: Performance intakes improve airflow to the turbos, reduce restriction, and support higher boost levels. They also provide a more pronounced turbo spool sound, giving immediate feedback on the upgrade.
Suspension & Chassis Bracing: With added power, chassis control becomes critical. Steeda rear subframe braces, differential bushings, and upgraded suspension components minimize drivetrain flex, improve traction, and deliver sharper handling without sacrificing ride quality.
Lethal Performance makes upgrading simple with curated Explorer ST Power Packages. Each package combines compatible components with matching tuning support to deliver reliable results at every stage:
These staged bundles eliminate guesswork and ensure every upgrade works together.
How much power can the stock turbos handle?
The factory twin-turbo 3.0L EcoBoost turbos are efficient into the mid-500 horsepower range at the wheels with proper tuning, fueling, and cooling support. Beyond that, upgraded turbos are recommended.
Do I need an intercooler upgrade if I’m only tuned?
Yes. Even on a tuned stock vehicle, intake air temperatures rise quickly, leading to power loss. An upgraded intercooler stabilizes charge temps and ensures consistent gains from your tune.
Is tuning safe for daily driving?
With professional calibration from tuners like Lund Racing, Palm Beach Dyno, or 5 Star, tuning is safe for daily use. Reliability comes from pairing proper hardware with conservative tuning strategies matched to your fuel quality.
What fuel options are supported?
On stock fueling, the Explorer ST supports 93 octane or equivalent. With upgraded high-pressure fuel pumps, ethanol blends (E30–E50) can be used safely for higher power output.
Will suspension upgrades hurt ride quality?
No. Properly designed subframe braces, bushings, and suspension kits control wheel hop and chassis flex without adding noise, vibration, or harshness. Ride comfort remains near-stock while handling improves.
Can I return my Explorer ST to stock after tuning?
Yes. Handheld tuners and RTD4 devices store your OEM calibration. You can reflash back to stock at any time.
The 2020–2024 Explorer ST is one of the most rewarding modern Ford platforms to modify. Whether you’re chasing faster quarter-mile times, more aggressive street performance, or simply a sharper daily driver, Lethal Performance has the parts, packages, and tuning expertise to deliver results.
Browse our curated catalog, explore stage-based power packages, and check out our Explorer ST Mod Guide for detailed recommendations.
