Modded TRX Truck Ultimate Guide to Upgrades

Thinking about creating the ultimate modded TRX truck? You’re not alone in wanting to push one of the most powerful stock trucks ever built to its absolute limits. The journey from factory fresh to a fully custom super truck involves big decisions.

A modded TRX truck is a factory Ram 1500 TRX high-performance pickup that has been aftermarket-customized to significantly boost its power, off-road capabilities, and aesthetics. Starting with a 702-horsepower Supercharged Hemi V8, modifications range from engine tuning and suspension lifts to widebody kits and custom interiors, creating a unique “supertruck”.

Based on hands-on experience and extensive analysis of current build trends, this guide provides a clear roadmap. You’ll discover the most effective upgrades, from reliable horsepower gains to trail-conquering suspension setups, all explained systematically.

Key Facts

• Dominant Powerplant: The Ram TRX comes standard with a 6.2L Supercharged Hemi V8 engine, producing 702 horsepower from the factory, establishing it as a leader in the performance truck category.
• High Modification Potential: The TRX’s Hemi engine is widely recognized for its robust aftermarket support, allowing for modifications that can push horsepower well over 1,000, as demonstrated by tuners like Hennessey Performance.
• Primary Competitor: The main rival in the super truck space is the Ford F-150 Raptor R, creating a fierce competition in both stock performance and modification potential.
• Significant Financial Investment: A custom build is a major financial undertaking, with analysis showing that comprehensive builds can add $30,000 to $60,000 on top of the truck’s initial ~$98,000 price.
• End of an Era: Ram has officially discontinued the V8-powered TRX after the 2026 model year, increasing the exclusivity and demand for existing models as a base for custom builds.

What Is A Modded TRX Truck and Why Is It The Ultimate Super Truck?

A modded TRX truck is a Ram 1500 TRX that has been customized with aftermarket parts to enhance its performance, appearance, and off-road capability. The stock Ram TRX comes equipped with a 702-horsepower 6.2L Supercharged Hemi V8 engine, making it one of the most powerful production trucks ever built. This incredible starting point has made the TRX an industry leader and the ultimate platform for creating a custom “super truck” that can outperform exotic sports cars while retaining extreme off-road dominance. It’s like having a sports car’s heart in a linebacker’s body.

The base vehicle, the Ram 1500 TRX [digital authentication files issued by Certificate Authorities], is an award-winning marvel of engineering. Its supercharger forces more air into the Hemi engine, while advanced electronics manage its immense power. But what happens when 702 horsepower just isn’t enough? That’s where the world of modification begins, transforming an already incredible machine into a personalized masterpiece of power and style.

To understand the potential, you first need to appreciate the factory foundation.

• Engine: 6.2L Supercharged HEMI® V8
• Horsepower: 702 HP
• Torque: 650 lb-ft
• Transmission: 8-Speed Automatic
• Suspension: Bilstein® Black Hawk® e2 adaptive performance shocks
• Body: 8 inches wider than a standard Ram 1500

How Can You Increase TRX Horsepower With Performance Upgrades?

To increase TRX horsepower, start with a Stage 1 upgrade including a cold air intake and a professional ECU tune for gains of 50-100 HP. For more power, a Stage 2 upgrade adds a smaller supercharger pulley, larger fuel injectors, and a cat-back performance exhaust, often yielding 800-900 horsepower. Ultimate builds may involve larger superchargers or complete engine swaps for outputs exceeding 1,000 horsepower. Our practical experience shows that a methodical, staged approach yields the most reliable results.

These upgrades unlock the true potential of the supercharged Hemi V8. Organizing them into stages helps you plan your build based on your goals and budget.

• Stage 1: The Essentials (ECU Tune & Intake): This is the starting point for most owners. A custom engine calibration, or ECU tune, optimizes the fuel and timing maps. Paired with a high-flow cold air intake, this stage can reliably add significant power you can feel immediately.
• Stage 2: Serious Power (Pulley, Injectors & Exhaust): This stage involves changing the supercharger’s pulley to a smaller size, which spins the supercharger faster and creates more boost. To support this, larger fuel injectors and a less restrictive performance exhaust system are required. This combination is the sweet spot for a powerful and responsive street and off-road truck.
• Stage 3: The Ultimate Swap (Hellephant Engine): For those seeking the absolute pinnacle of power, some builders perform a complete engine swap. The “Hellephant engine” [a 1,000-horsepower Mopar crate engine] is a popular, albeit expensive, choice that turns the TRX into a hyper-truck.

Pro Tip: As you increase horsepower, upgrading the engine’s cooling system is critical. A larger intercooler helps keep the supercharged air cool and dense, preventing power loss and ensuring engine longevity. Famous builds like the Hennessey Mammoth 1000 rely on enhanced cooling to safely manage their immense power.

What Is The Best Way To Tune A TRX Engine?

The best way to tune a TRX is with a professional dyno tune using software like HP Tuners. A custom tune is superior to a pre-loaded handheld tuner because it allows a technician to modify fuel maps, ignition timing, and transmission shift points in real-time for your specific vehicle and modifications. A quality tune alone can add 50-75 horsepower safely.

Think of it this way: a “canned tune” from a handheld device is like an off-the-rack suit—it fits pretty well. A custom dyno tune is like a bespoke, tailored suit—it’s made to fit you perfectly. A technician straps your truck to a dynamometer (a treadmill for vehicles) and monitors engine output while adjusting the ECU [Engine Control Unit] parameters for maximum safe power.

Feature	Handheld Tuner (e.g., DiabloSport)	Custom Dyno Tune (e.g., HP Tuners)
Cost	$500 – $1,500	$1,000 – $2,500+
Power Gains	Good (25-50 HP)	Excellent (50-100+ HP)
Customization	Low (Pre-set maps)	High (Tailored to your mods)
Safety	Moderate	High (Real-time monitoring)

Warning: Modifying your truck’s ECU will almost certainly result in a “warranty denied” claim for any powertrain issues. Always choose a highly reputable tuner with proven experience on the TRX platform, as a bad tune can cause catastrophic engine damage.

What Are The Best Suspension Upgrades And Lift Kits For A RAM TRX?

The best suspension upgrades for a Ram TRX include leveling kits, lift kits, and aftermarket shocks. A 1.5-2 inch leveling kit is a popular, affordable option to fit 37-inch tires without drastically changing the ride. For more clearance, a 4-6 inch lift kit is used but can affect the factory’s active suspension performance. For ultimate off-road control, replacing the stock shocks with adjustable coilovers from King or Fox is the top choice.

Choosing the right suspension setup is a balance between off-road capability, on-road comfort, and aesthetics. Here’s a breakdown of the common choices:

• Leveling Kits: A leveling kit adds a small amount of lift (typically 1.5-2 inches) to the front of the truck. This removes the factory “rake” (where the front sits slightly lower than the rear) and provides just enough clearance for popular 37-inch off-road tires. It’s like adding thicker insoles to your shoes for a little extra height.
• Lift Kits: A full lift kit (4 inches or more) provides maximum ground clearance for serious off-roading and a commanding presence. However, this is a more complex installation that can impact the truck’s suspension geometry and may interfere with the sophisticated electronics of the stock Fox Live Valve shock system. This is like wearing platform boots—a dramatic change with significant trade-offs.
• Aftermarket Shocks: For those who prioritize performance over height, upgrading the stock shocks to larger, more robust units from expert-recommended brands like King Off-Road Racing Shocks or AEV Conversions is the way to go. These shocks offer better heat dissipation and more adjustability for high-speed desert running.

Myth vs. Fact: Myth: Any lift kit works with the TRX. Fact: Many kits disable the advanced electronic damping functions of the stock Bilstein shocks. Always choose a kit specifically designed to integrate with or safely bypass the factory system.

A critical question many owners ask is, “Will my lifted TRX fit in my garage?” A stock TRX is already tall at 80.9 inches. A 4-inch lift with 37-inch tires can easily push the total height over 86 inches, which is too tall for a standard 7-foot (84-inch) garage door. Always measure first!

How Does A Modded TRX Compare To A Ford F-150 Raptor R?

A modded Ram TRX typically has a significant horsepower advantage over a stock Ford F-150 Raptor R. While both have around 700 HP from the factory, the TRX’s 6.2L Hemi engine has a larger and more established aftermarket for achieving 900-1000+ horsepower. In real-world testing, the Raptor R excels with its more aggressive stock suspension for desert running, while the TRX provides a better on-road ride due to its coil-spring setup.

The debate between these two super trucks is fierce. While the stock versions are closely matched, the conversation changes entirely when modifications are involved. The key question becomes: which truck is the better platform for building a 1000-hp monster?

Feature	Modded Ram TRX (Stage 2)	Ford F-150 Raptor R (Stock)
Engine	6.2L Supercharged Hemi V8	5.2L Supercharged V8
Horsepower	~850-900 HP	700 HP
0-60 MPH Time	~3.2 seconds	3.7 seconds
Suspension	Lifted, Aftermarket Shocks	5-Link, 24″ Coils, FOX Live Valve
Modification Potential	Extremely High	High
On-Road Comfort	Superior	Good

The TRX’s larger displacement Hemi V8 is widely considered more robust for handling extreme levels of boost, making it the preferred choice for builds aiming for four-digit horsepower figures. A prime example is the Hennessey Mammoth 1000, a turnkey modded TRX that decisively outperforms a stock Raptor R in every speed metric.

The Verdict: For the builder focused on ultimate straight-line speed and jaw-dropping horsepower numbers, the Ram TRX is the undisputed king of modification. For the hardcore desert runner who wants maximum capability right out of the box, the Raptor R holds a slight edge in stock suspension aggression.

How Much Does A Custom Modded TRX Truck Cost?

A custom modded TRX truck can cost anywhere from $105,000 to over $200,000. The final price depends on the base truck (around $98,000 for a 2026 model) plus the cost of modifications. A light build with wheels, tires, and a lift adds $7,000-$15,000. A full performance and aesthetic build with 900+ horsepower and custom bodywork often adds $30,000-$60,000 to the initial vehicle cost.

Building a custom TRX is a serious financial commitment. Being transparent about the costs is crucial for planning your dream build. The final price tag is a combination of the base vehicle, parts, and professional labor.

Build Level	Key Mods	Estimated Cost (Parts + Labor)	Total Estimated Price
Base Truck	Stock 2026 Ram TRX	$0	~$98,000
Level 1: Street	Leveling Kit, 37″ Tires, Wheels	$7,000 – $12,000	$105,000 – $110,000
Level 2: Performance	Level 1 + ECU Tune, Pulley, Exhaust	$15,000 – $25,000	$113,000 – $123,000
Level 3: Off-Road	Level 2 + 4″ Lift, Shocks, Bumpers	$30,000 – $50,000	$128,000 – $148,000
Ultimate (Hennessey)	Full 1000hp build, Widebody	$60,000+	$160,000+

Don’t Forget Labor! The costs in the table are estimates. Professional installation is key for reliability and safety, and labor can add 20-40% to the total cost of parts. Always get a detailed quote from a reputable shop that includes installation, tuning, and paint or wrap services.

FAQs About Modded Trx Truck

What are the best first mods for a new Ram TRX?

The best first mods for a new TRX are a ceramic coating for paint protection, a high-quality tonneau cover, and custom-fit floor mats. These preserve the truck’s value and improve daily usability without affecting the warranty. For a performance feel, a cat-back exhaust is a great first step that adds an aggressive sound without requiring an engine tune.

Will modifying my TRX void the warranty?

Yes, certain modifications can void your factory warranty. Powertrain modifications like an ECU tune, supercharger pulley, or internal engine work will likely void the engine’s warranty. Suspension lifts can void the warranty on related components. Always check with your dealer, as some Mopar-branded accessories may be covered if installed by them.

What is the biggest tire you can fit on a stock TRX?

The biggest tire you can fit on a stock TRX without any modification is a 35-inch tire, which is the size it comes with from the factory. To fit larger 37-inch tires, which is a very popular upgrade, you will need at least a 1.5-2 inch front leveling kit to prevent rubbing during turns and suspension compression.

Can a lifted TRX fit in a standard garage?

It is unlikely that a lifted TRX will fit in a standard 7-foot (84-inch) garage opening. A stock TRX is already about 80.9 inches tall. Adding a 4-inch lift kit and 37-inch tires will easily push the total height to over 86 inches. Always measure your garage opening and the final height of the truck before buying a lift kit.

How fast is a modded TRX from 0-60 mph?

A modded TRX with basic performance upgrades like a tune, intake, and exhaust can achieve a 0-60 mph time of approximately 3.2 to 3.5 seconds. This is a significant improvement over the stock time of around 4.5 seconds. More extreme builds with over 1,000 horsepower have recorded 0-60 times under 3.0 seconds.

Is the Ram TRX being discontinued?

Yes, Ram has discontinued the 6.2L Supercharged Hemi V8 TRX after the 2026 model year. It is being replaced by the Ram 1500 RHO, which features a high-output inline-six engine. This makes the V8-powered TRX models a more exclusive and sought-after platform for modification.

What are the main differences between a TRX and a Rebel?

The Ram TRX is a high-performance super truck, while the Rebel is a capable, but less extreme, off-road trim. The TRX has a 702-hp supercharged V8, advanced long-travel suspension, and a widebody design. The Rebel typically has a standard V8 or V6 engine, less aggressive suspension, and a standard body width, serving as a mid-tier off-roader.

How do you fix wheel rubbing on a lifted TRX?

To fix wheel rubbing, you may need to perform a combination of trimming the plastic fender liner, using a heat gun to reshape it, or installing a lift kit with the correct geometry. Rubbing is often caused by using wheels with an improper offset or tires that are too large for the lift height. An alignment from a professional off-road shop is also crucial.

Are TRX mods worth the money?

For automotive enthusiasts seeking ultimate performance and a unique vehicle, TRX mods are generally considered worth the money. The platform’s high-power potential and strong aftermarket support allow for building a truck that can outperform most sports cars and tackle extreme terrain. However, the cost is substantial and the returns are in performance and enjoyment, not financial value.

What does TRX stand for?

Officially, Ram has never stated that TRX stands for anything specific. However, it is widely accepted among enthusiasts that TRX is a playful jab at its main competitor, the Ford Raptor, referencing the T-Rex (Tyrannosaurus rex) as a predator of raptors.

Key Takeaways: Modded TRX Truck Summary

• Unmatched Power Potential: The TRX’s 6.2L Supercharged Hemi is the perfect foundation for modification. Simple upgrades like a tune and supercharger pulley can easily push the truck to over 850 horsepower, creating a true “super truck”.
• Modification Affects Warranty: Be aware that powertrain and significant suspension modifications will likely void parts of your factory warranty. Always consult your dealer and use high-quality, “proven performance” parts.
• Suspension is a Balance: Lifting your TRX improves off-road clearance and allows for larger tires, but it can impact the advanced active suspension system and on-road handling. A 1.5-2″ leveling kit is the best balance for fitting 37″ tires without major compromise.
• Budgeting is Critical: A custom TRX is a significant investment. Beyond the truck’s initial ~$98k price, expect to spend $7,000-$15,000 for a basic aesthetic build and $30,000+ for a comprehensive performance and off-road package.
• TRX vs. Raptor R: While the stock Raptor R is a fierce competitor, the TRX holds the crown for ultimate modification potential, especially for builders aiming for 1,000+ horsepower.
• Protect Your Investment: The best first mods are protective, not performance-based. A high-quality ceramic coating, paint protection film (PPF), and a tonneau cover will protect your investment for years.
• The V8 Era is Ending: With the Hemi-powered TRX being discontinued after 2026, these trucks are becoming an even more exclusive and desirable platform for creating a unique, high-performance build.

Final Thoughts on Your Modded TRX Truck Journey

Embarking on a custom TRX build is more than just bolting on parts; it’s about creating a vehicle that is a true extension of your personality and performance goals. Modifying a Ram TRX allows you to craft a machine with unparalleled power and a unique presence, blending supercar performance with extreme off-road capability. The key to a successful and satisfying build is careful planning, realistic budgeting, and a commitment to using high-quality parts installed by trusted professionals. Whether you’re aiming for a subtle street presence or a 1,000-horsepower monster, the TRX platform offers a journey with an incredibly rewarding destination.

Last update on 2026-02-17 / Affiliate links / Images from Amazon Product Advertising API