6.0 Power Stroke Power Guide: Stage 1 and 2 (2003-2007) | Alligator Performance

A healthy 6.0L Power Stroke responds well to power, but more than any other diesel it punishes owners who add power before fixing its weak points. Head studs, a healthy oil cooler and EGR cooler, and a strong FICM come first. This guide lays out Stage 1 and Stage 2 for 2003-2007 trucks, each with a towing build and a max power build.

Every card shows the fitment as it appears on the product page, and parts listed with a CARB Executive Order carry a green badge with the EO number.

Quick answer: the best power upgrades for your truck

2003-2007

Head studs, oil cooler, EGR cooler and FICM health come before power.
Stage 1 towing: head studs, Edge Evolution CTS3 and an aFe intake.
Stage 2 towing: a FASS lift pump, up-pipes and a 5R110W converter.
Stage 2 max power: add the BD Screamer Stage 1 GT37 turbo.

Before you add power

Do these first, in this order: check the EOT and ECT gap (more than 15°F means a clogging oil cooler), confirm the EGR cooler is not leaking, test FICM voltage, and install head studs. Fix high pressure oil leaks and keep fuel pressure above 45 psi. A 6.0 that passes these checks handles the power in this guide well.

Tuning and some performance parts can affect your factory powertrain warranty. Check before you install.

2003-2007

Start with a healthy truck: work through the 2003-2007 maintenance guide first.

Stock power and where the limits are

Every number below is a factory rating at the crank or a typical figure at the wheels, as noted. "Reliable towing target" is where we suggest a truck that tows stops, so the engine, transmission and cooling system all live a long time.

Years	Stock rating	Transmissions	Reliable towing target	First limit you hit
2003-2007	325 hp, 560 lb-ft (2003-2004); 570 lb-ft (2005-2007)	5R110W automatic, ZF6 6-speed manual	Factory power plus about 75 hp, with studs, healthy coolers and the transmission ready	Head bolts, then the 5R110W

Stage 1: bolt-ons and tuning

Stage 1 is the bolt-on step: tuning (where a legal option exists), better airflow and the gauges to watch what the engine is doing. The towing build is what we recommend for most trucks. The max power build adds the parts that let the same truck make more power without giving up reliability.

2003-2007

Install head studs before any tuning. The factory torque-to-yield head bolts stretch, and added cylinder pressure makes it worse. Once studs are in and the coolers are healthy, the Edge Evolution CTS3 is covered by CARB EO D-802-13 for 2003-2007 6.0L trucks and monitors oil and coolant temperature, the gap that tells you the oil cooler is clogging. In testing for an earlier Edge programmer (CARB EO D-541-18), CARB recorded a 75 hp gain on a 2006 F-250.

Stage 1 towing build

Best for most trucks that tow.

Do first

Gator Fasteners HSK60 Head Stud Kit

Gator head stud kit for the 6.0. Do this first.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Towing pick

Edge 85400-100 CTS3 Diesel Evolution Programmer

Edge Evolution CTS3 programmer and monitor. Watch the EOT and ECT gap.

Listed with CARB EO D-802-13

Listed fitment: 1994-2019 Ford F250/F350 7.3L/6.0L/6.4L/6.7L Powerstroke

Check price and fitment

aFe Power 51-73003 Momentum HD Cold Air Intake System with Pro DRY S Filter

aFe Momentum HD intake with a dry filter.

Listed with CARB EO D-550-24

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

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Stage 1 max power build

Adds to the towing build for more power.

Sinister SDINTRPIPE60Cold Side Intercooler Pipe

Sinister cold side intercooler pipe. Replaces the factory pipe and boots.

Listed with CARB EO D-721-5

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Sinister SDINTRPIPE60HOT Hot Side Intercooler Pipe

Sinister hot side intercooler pipe.

Listed with CARB EO D-721-5

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Diamond Eye K4338A 4 inch Aluminized Cat-Back Single Exit No Tip Exhaust

Diamond Eye 4 inch aluminized cat-back exhaust. Keeps the factory converter.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

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aFe Power 50-73003 Momentum HD Cold Air Intake System with Pro 10R Filter

The same aFe intake with an oiled Pro 10R filter.

Listed with CARB EO D-550-24

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Stage 2: fuel, turbo and the parts that support them

Stage 2 adds fuel supply and airflow, and the supporting parts that keep the extra power reliable. On most trucks the transmission has to be part of Stage 2, so it is included here.

2003-2007

Stage 2 adds a filtered lift pump, a turbo listed with an EO and the 5R110W upgrades. Up-pipes listed with an EO replace the factory pipes, which crack and leak boost.

Stage 2 towing build

Fuel supply and drivetrain first.

Towing pick

FASS TSF14180F140G Titanium Signature Series 140GPH 55PSI Fuel Lift Pump

FASS 140 gph lift pump with filtration and water separation.

No CARB EO: not legal for sale or use in California

Listed fitment: 1999-2007 Ford F250/F350 7.3L Powerstroke/6.0L Powerstroke

Check price and fitment

ATS 302-955-3278 5R110 Five Star Torque Converter

ATS Five Star torque converter for the 5R110W.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

2003-2004

Sinister SD60YP03 50 State Legal Up-Pipe Kit

Sinister up-pipe kit for 2003-2004 trucks.

Listed with CARB EO D-721-9

Listed fitment: 2003-2004 Ford F250/F350 6.0L Powerstroke

Check price and fitment

2004.5-2007

Sinister SD60YP045 50 State Legal Up-Pipe Kit

Sinister up-pipe kit for 2004.5-2007 trucks.

Listed with CARB EO D-721-9

Listed fitment: 2004.5-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Stage 2 max power build

Adds to the towing build for more power.

BD Diesel 1045818 Screamer Stage 1 Performance GT37 Turbo

BD Screamer Stage 1 GT37 drop-in turbo.

Listed with CARB EO D-553-28

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

ATS 309-912-3278 5R110 Stage 1 Transmission Package

ATS Stage 1 5R110W transmission package. Comes in 2WD and 4WD versions; match it to your truck.

Listed fitment: 2003.5-2007 Ford F250/F350 Powerstroke 2WD

Check price and fitment

Transmission and clutch

2003-2007

The stock 5R110W can live at around 500 hp if it is maintained and kept cool, but heavy towing shortens that. Add a converter at Stage 1 on a truck that tows; at Stage 2, plan on a built transmission. ZF6 manual trucks need a stronger clutch.

ATS 302-930-3278 5R110 Triplelok Torque Converter

ATS Triplelok triple-disc converter for the 5R110W.

Listed fitment: 2003-2007 Ford F250/F350 6.0L Powerstroke

Check price and fitment

Valair NMU70432-01 HD Organic Clutch with Flywheel Rated at 400HP

Valair HD organic clutch with flywheel for ZF6 trucks, rated at 400 hp: suits stock to mild Stage 1.

Listed fitment: 2003-2010 Ford 6.0L/6.4L Powerstroke

Check price and fitment

Safe towing temperatures

Added power means added heat. These are the numbers to watch on your gauges while towing. They are sustained readings, not short spikes on a hill.

Reading	Normal while towing	When to act
EGT (probe before the turbo)	Under about 1,200°F sustained	Back off or downshift if it stays above 1,250°F. On trucks with a particulate filter, sustained heat above that risks the filter.
EGT (probe after the turbo)	Reads about 200-300°F lower than a pre-turbo probe	Know which probe your gauge uses before you set an alarm.
Transmission fluid	170-200°F	Act at 210-225°F sustained: slow down, downshift, add cooling.
Coolant	195-220°F	Act if it stays over 225°F.
Engine oil	210-240°F	Act at 250°F or more, sustained.

Emissions and legal fitment

Every part in this guide keeps your truck's factory emissions equipment in place and working. Where a part is listed with a California Air Resources Board Executive Order (CARB EO), the card says so. That EO exempts the part from California's tampering law (Vehicle Code 27156) for the vehicles it lists. An EO covers only the exact part numbers, years and engines it lists, and an EO for a tuner covers only the maker's preloaded tunes: a custom tune is not covered. Each EO covers its part by itself; CARB has not evaluated combinations of tuned parts. Parts marked "No CARB EO" are not legal for sale or use in California on pollution-controlled vehicles. Exhaust that bolts on behind the catalytic converter or particulate filter generally does not need an EO, but local noise rules still apply.

2003-2007

The 6.0 has cooled EGR and a catalytic converter, but no particulate filter. Keep both. The cat-back exhaust bolts on behind the converter. The Edge CTS3 is covered by CARB EO D-802-13 with its preloaded tunes; the intake, intercooler piping, up-pipes and turbo are listed with EOs on their product pages.

Shop parts for your truck

Shop all 2003-2007 parts and accessories

Not sure which parts your truck needs?

Alligator's sales team helps 6.0 Power Stroke owners plan these upgrades every day. Tell us what your monitor shows, what has already been done and what you tow, and we will put the jobs in the right order.

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Frequently asked questions

Do I really need head studs before tuning a 6.0?

Yes. The factory head bolts stretch, especially with heat from the EGR cooler, and added cylinder pressure makes head gasket failure much more likely. Studs go in first.

Is the Edge Evolution CTS3 legal on a 6.0?

Yes. CARB EO D-802-13 covers it on 2003-2007 6.0L F-250 and F-350 trucks when you use Edge's preloaded tunes.

How much power can a 6.0 tow with reliably?

Plan on factory power plus about 75 hp with the parts in this guide, with head studs, healthy coolers and the transmission ready for it.

What should I watch on the gauges after tuning a 6.0?

The gap between engine oil temperature and coolant temperature. If it grows past about 15°F at operating temperature, the oil cooler is clogging and needs attention before it damages the EGR cooler.