The 7.3L Powerstroke is commonly regarded as possibly the best Powerstroke engine that Ford has made to date. It wasn’t plagued with the head gasket problems of the 6.0L Powerstroke, nor was it weighed down by the emission issues that were found in the 6.4L Powerstroke and the 6.7L Powerstroke. These factors and more allow the 7.3 to have incredible reliability and power capability, making it an excellent powerplant that lasts for a very long time.

My praises for the 7.3 aside, we all know how good it is, but there are still a few things that can be done to improve it beyond what Ford engineered it to do. The best mods for these engines have to do with reliability, adding power, and improving MPGs. A lot of them are quite simple, effective, and cheap, and will work wonders to transform your truck to another level of performance.

We came up with his guide to categorize the most popular mods for the 7.3L. In the name of keeping it simple, it starts with the most popular mods to do, the ones that have the most impact on performance and goes down the list from there. You can also use the table of contents below to skip to whatever mod you might be interested in most.

Best Intake Kit for the 7.3L

• S&B Filters Cold Air Intake (Reusable Filter)

There is not much else (for the cost) that can wake up your truck like a new cold air intake. This S&B intake is probably the best that we’ve used for the 7.3L Powerstroke, it offers such a great return on investment as far as smiles per gallon go. A cold air intake is crucial for a starting mod, as it allows the engine to pull in a much higher volume of air, setting you up for success later down the line when you increase boost and lower backpressure. 

aFe Power Magnum FORCE 54-10792 Ford Diesel Truck 94-97 V8-7.3L (td) Performance Intake System (Oiled, 5-Layer Filter)

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Features

• Open intake design for added power and sound
• Dyno-proven gains and improved throttle response
• Massive air filter with Pro 5R oiled cotton media for maximum air flow
• This item is 50-State legal: CARB EO# D-550-4

Best Exhaust Kit for the 7.3L

• Magnaflow Turbo Back Single Side Exhaust System

Once you have the volume of air into the engine increased from upgrading to a high flow cold air intake, you’ll need to upgrade the flow out of the engine through the exhaust to match. A larger exhaust exhaust with smoother bends allows you to do this, by reducing the amount of backpressure behind the turbo. As we all know, combustion engines are basically complicated air pumps. The more air that you can pull in and then pump out, the more power can be made. It also increases the efficiency of the burn, if you upgrade the fueling to match.  

4" Turbo Back Exhaust for 7.3L Powerstroke

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A huge performance upgrade for the 7.3L Powerstroke, this exhaust system allows for maximum flow and minimum turbo backpressure, making your truck run more efficiently and with more power!

Key Features:

Delivers an Aggressive, Deep Exhaust Note
Includes Maximum Flow Muffler Delete Pipe
Installs with Common Hand Tools
Boosts Torque and Horsepower
Maximum Performance at a Minimum Price
Not for Use on Vehicles Equipped with a Catalytic Converter
1 Year Manufacturer’s Warranty

Best Tuner Chip for the 7.3L

• TS Performance 6-way Switchable Tune

All the higher flow upgrades that you add to your truck are not going to do you nearly as much good until you adjust the fuel and burn to take full advantage of the added air. Fortunately for the 7.3L this is both easy and cheap to do, with a TS Performance chip. Simply plug the chip into your trucks PCM, and then run the wire for the tune selector to an easy to reach place by the steering wheel. The 6-position selector switch actually has 8 total options and allows you to change between the pre-loaded tunes as follows:

1. Valet Mode for when you don’t want a driver to have full power
2. Stock Mode for normal driving
3. High-Idle Mode to allow you quickly warm up your truck 
4. Anti-Theft Mode for added protection
5. 50 HP mode increases the wheel horsepower by 50
6. 75 HP mode of course is a 75 horsepower increase
7. 100 HP mode starts to add quite a bit of power at 100 more hp
8. 140 HP mode will be where you need to start adding supporting mods

TS Performance Part # 1180402 Diesel Performance Horsepower/Fuel Economy Switchable Chip

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Features
Detailed Instructions Included
All HP Settings are RWHP
Easy Installation
In Cab Adjustable
Hardware and Programming are TS Performances' Design

Best Gauges for the 7.3

• GlowShift complete gauge kit

If you have started upgrading and tuning your 7.3L, the most important thing that you can to preserve the heath of your engine is to monitor the vitals. In order of importance, the most critical things to monitor on any diesel are the EGT’s (exhaust gas temperatures) the boost pressure, and the transmission temperature (especially if towing.) This gauge set allows you to do that in one easy to install package.

GlowShift 1999-2007 Ford Superduty Tan Gauge Package Black Face Boost, EGT & Trans Temp

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Features

• GlowShift Diesel Gauge Package for the 1999-2007 Ford Super Duty 7.3L 6.0L Power Stroke F250 F350 Truck features a Factory Color Matched Tan Triple Pillar Pod, Black 7 Color Series 3 Gauge Diesel Set, Boost MAP Line T-Fitting Adapter, 3 Gauge Power/Sensor Wiring Harness & an Installation Guide that Walks Users Through the Process of Installing the Gauges, Sensors & Pod Step-By-Step
• Includes 60 PSI Boost Gauge with 1/8-27 NPT Compression Fittings, 9' Nylon Boost Hose & Boost MAP Line T-Fitting Adapter - 1500°F Pyrometer EGT Gauge with 1/8-27 NPT EGT Probe with 3' of Wire, 6' Sensor Harness & 2' Power Harness - Transmission Temperature Gauge with 1/8-27 NPT Temperature Sensor & 2' Power/Sensor Harness - Black 7 Color Series Features a Black Dial, Clear Lens, 7 Solid Color Modes & 2 Color Cycle Modes
• Factory Color Matched Tan Triple Pillar Pod for 1999-2007 Ford Super Duty 7.3L 6.0L Power Stroke F250 F350 Trucks Mounts 3 Gauges to the Truck's A-Pillar - Overlay Design Mounts Pod on Top of the Factory A-Pillar - Manufactured from ABS Plastic - UV Protected - Includes Mounting Hardware
• Includes Ford Super Duty 7.3L 6.0L Power Stroke Installation Guide Complete with Step-By-Step Instructions & Photos that Help Walk You Through the Process of Installing & Wiring this Diesel Gauge Package to Your Truck
• GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support

Turbocharger Upgrade for 7.3L

• Garrett Powermax GTP38R Ballbearing Turbocharger

The best turbo upgrade that you can do for your 7.3L is to swap over to this Garrett ball-bearing monster. With this upgrade, you can replace your tired original turbo with one that can spool much faster and supply significantly more boost throughout the entire rev range, giving you more power and torque.

Garrett Powermax GTP38R Ballbearing Turbocharger for Powerstroke 7.3L

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Features

• Patented Garrett dual ball-bearing cartridge
• Complete bolt-in kit
• Patented Garrett dual ball-bearing cartridge

AIH Delete Mod

• Air Intake Heater Boost Plug Sensor Thread Adapter

This mod allows you to remove the restrictive air intake heater out of the flow of incoming boost.

This heater is only activated at low ambient temps while the truck is idling for an extended time, so 90% of drivers won’t even know its gone. The conditions for when it runs are as follows: oil temps below 131°F, glow plugs off, trans in park/neutral, parking brake on, charging system between 11.5 and 15.0 volts, and ambient temp below 32°F.

For how little it runs, it’s a lot better to pull that big heater element out and replace it with this plug, which also allows you to easily add an aftermarket boost pressure sensor.

GlowShift Fuel Pressure Sensor Thread Adapter Compatible with 7.3L Ford F-250 F-350 Super Duty Power Stroke Diesel 1999-2003 - Installs to The Fuel Filter Housing - includes O-Ring

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Features

• GlowShift Fuel Pressure Sensor Thread Adapter Allows Users to Install a Fuel Pressure Sensor to the Fuel Filter Housing
• Compatible with 1999-2003 Ford Super Duty 7.3L Power Stroke
• Features a 1/8-27 NPT Female Thread Port & O-Ring for a Leak-Free Seal
• Includes Step-By-Step Installation Instructions
• GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support