KC Stage 3 Turbo 68/70 - 6.0L Powerstroke 2003-2007

The KC Stage 3 68mm turbo is the most powerful single-turbo option in the KC lineup for the 2003-2007 Ford 6.0L Power Stroke - built for owners who want to daily drive during the week and compete on the weekends. Supporting injectors up to 205cc/75% over and targeting 600-675 HP with supporting mods, the Stage 3 steps well beyond the tow-and-power balance of the Stage 2. It ships brand new with no core return required and includes an install kit.

The KC Stage 3 is a 100% drop-in for 2003-2007 6.0L Power Stroke trucks with no modifications required. This turbo is not recommended for stock injectors or heavy towing. Tuning is not included and must be sourced separately.

KC Stage 3 - Built for Power, Not for Towing

The Stage 3 is built around a 68mm single-plane point-milled billet compressor wheel with extended tip technology and a 70mm 10-blade quick-spool turbine wheel, paired with a .70AR race compressor cover with drilled anti-surge ring, new high-flowing vanes, and an upgraded unison ring. KC calls it a monster for a reason - it runs hard on the dyno and the track while still offering real daily-drive street manners.

Buy the Stage 3 if your 6.0L Power Stroke is a competition-focused build with big injectors and a full supporting setup. Step back to the Stage 2 if towing is a regular part of your use case or injectors are in the 190cc range. Confirm your injector size and build plan, and this is the right turbo to order for a 6.0L competition build targeting 600+ HP.

KC Stage 1 vs Stage 2 vs Stage 3 - 6.0L Power Stroke

Use the table below to confirm the Stage 3 is the right fit. The critical dividing line is use case: the Stage 3 is a power-first turbo, not a towing turbo.

KC Stage 3 Gen 2 - What Makes It a Monster

The Gen 2 Stage 3 is built around the largest compressor and turbine in the KC lineup for the 6.0L Power Stroke. The 68mm billet compressor wheel with extended tip technology moves significantly more air than the Stage 2's 64mm wheel at high RPM. The 70mm 10-blade quick-spool turbine wheel is engineered to recover spool speed at that compressor size - which is why the Stage 3 still delivers real daily-drive street manners despite its power ceiling.

The .70AR race compressor cover with drilled anti-surge ring maximizes airflow at the top of the RPM range. New high-flowing vanes, an upgraded unison ring, and a 360-degree thrust bearing round out the build. KC recommends custom Edge or SCT tuning - not included, must be sourced separately.

Exhaust Brake Compatibility

Some aftermarket exhaust brake brands have clearance issues with this turbo that can cause the brake flapper to rub the turbine wheel or reduce performance. The extreme back pressure exhaust brakes generate is hard on both the turbo and engine. KC does not recommend exhaust brake use with this turbo. It is the buyer's responsibility to verify fitment and functionality before ordering if an exhaust brake is part of the setup.

What Comes in the Box

The KC Stage 3 ships complete for the core turbo replacement path:

• KC Stage 3 68mm turbocharger (Gen 2, brand new)
• New VGT solenoid (installed)
• Install kit

No core return is required. Custom Edge or SCT tuning is strongly recommended by KC but is not included and must be sourced separately.

KC Stage 3 Specs - 6.0L Power Stroke

Confirm these specs match your build before adding to cart:

If your year, injector size, and build goal match the specs above, this is the right turbo to order.

KC Stage 3 Part Numbers - 6.0L Power Stroke

Match your order reference against the list below - if your number appears here, you are ordering the correct KC Stage 3 for the 6.0L Power Stroke:

Avoid These Common Mistakes

• Ordering for a heavy towing application - KC does not recommend the Stage 3 for heavy loads; choose the Stage 2 instead.
• Expecting 600-675 HP without a full supporting setup - power at this level requires more than a turbo swap alone.
• Assuming tuning is included - custom Edge or SCT tuning is highly recommended but must be sourced separately.
• Assuming exhaust brake compatibility - buyer must verify fitment and function before ordering.
• Ordering with a California or Colorado delivery address - cannot ship to CA or CO addresses.

Fitment - 2003-2007 Ford 6.0L Power Stroke

The KC Stage 3 is a 100% drop-in for the following 6.0L Power Stroke applications with no modifications required:

• 2003-2007 Ford F-250 Super Duty 6.0L Power Stroke
• 2003-2007 Ford F-350 Super Duty 6.0L Power Stroke

Verify your model year, injector size, and build plan before ordering - the Stage 3 is a power-first turbo and the supporting setup must match.

Final Order Checklist

• Vehicle confirmed: 2003-2007 Ford F-250 / F-350 6.0L Power Stroke
• Injector size confirmed - not running stock injectors
• Use case confirmed: competition / daily driver, not a dedicated tow rig
• Supporting modifications planned for the 600-675 HP target
• Custom Edge or SCT tuning sourced separately
• Non-CA / non-CO delivery address confirmed

For a 2003-2007 6.0L Power Stroke competition build with big injectors and a full supporting setup, the KC Stage 3 is the correct power-first drop-in turbo to order.

KC Stage 3 - See the Power on the Dyno and Track

Watch the Stage 3 in action before you order: