KC Jetfire Stage 3r Gen 2 Dual Ball Bearing Turbo - 6.0L Power Stroke

The KC Jetfire Stage 3r Gen 2 Dual Ball Bearing turbo is KC's highest-output drop-in VGT upgrade for the 6.0L Power Stroke - 100% drop-in, no core required, and a full install kit included. This is not a Stage 2 with minor revisions; the Stage 3r Gen 2 runs a larger 68x94mm billet compressor wheel with tips extended to 100mm, a redesigned 74x70 10-blade turbine wheel, and an upgraded unison ring - built to support up to 205cc / 75% over injectors and 650-700 hp with supporting modifications. If your 6.0L build is running serious injector upgrades or is headed there, the KC Jetfire Stage 3r Gen 2 DBB is the turbo to order.

Stage 3r Gen 2 or Stage 2r Gen 2 - Which Build Is This For?

The Stage 3r Gen 2 DBB is built for 6.0L Power Stroke applications that have moved past the 190cc / 30% over injector range. The larger 68x94mm compressor wheel - with tips out to 100mm - and the upgraded unison ring are what separate the Stage 3r from the Stage 2r. That additional wheel size and upgraded actuation are what allow the Stage 3r to support up to 205cc / 75% over injectors and 650-700 hp with the right supporting modifications.

Choose the Stage 3r Gen 2 when your injector size or power target has grown past what the Stage 2r supports. If your build tops out around 600-650 hp with up to 190cc / 30% over injectors, the KC Jetfire Stage 2r Gen 2 DBB is the properly sized option for that range. Both turbos are 100% drop-in with no core required - the decision comes down to matching the turbo to the injector level and power plan.

No core return is required. The install kit ships with the turbo. If your build plan matches the 205cc / 75% over injector range, this is the correct turbo to order.

KC Jetfire Stage 3r Gen 2 DBB - What Changed

KC spent years redeveloping and testing the Gen 2 Stage 3r before releasing it. Every major component is purpose-built for the higher injector and power demands of a serious 6.0L build.

• Gen 2 Dual Ball Bearing: Upgraded dual ball bearing center section for faster spool response and reduced bearing wear versus journal bearing designs.
• Redesigned 68x94mm Jetfire Compressor Wheel: Single-plane point-milled billet wheel with tips extended to 100mm - larger than the Stage 2r's 64x88mm wheel - for increased airflow at high demand.
• 0.70 A/R Race Compressor Cover: KC's signature drilled-hole anti-surge ring for maximum airflow and surge suppression under load.
• Redesigned 74x70 Jetfire Turbine Wheel: 10-blade quick-spool design for fast response from idle through the top end.
• Upgraded Unison Ring: Revised unison ring for improved VGT vane actuation at higher output levels.
• New High-Flow Vanes: Updated vane pack for improved exhaust-side flow and VGT control.
• New VGT Solenoid: Factory-style solenoid interface so OEM calibration and VGT control remain intact on a drop-in install.

The Gen 2 dual ball bearing center section is the platform-level upgrade that separates this from a standard VGT rebuild or a journal bearing Stage 3. Ball bearing turbos spool faster, respond quicker at partial throttle, and reduce center-section wear over time - all of which matter on a heavily built 6.0L running large injectors and serious power.

KC Jetfire Stage 3r Gen 2 vs Stage 2r Gen 2 - Side by Side

Use this table to confirm which KC Jetfire Gen 2 turbo matches your build:

If your build is at or approaching the 205cc / 75% over injector mark, the Stage 3r Gen 2 is the correct turbo. For builds in the 600-650 hp range, see the Stage 2r Gen 2 DBB.

What Comes in the Box

The KC Jetfire Stage 3r Gen 2 DBB ships as a complete, ready-to-install unit:

• KC Jetfire Stage 3r Gen 2 Dual Ball Bearing VGT turbocharger (assembled, brand new)
• New VGT solenoid (pre-installed)
• Install kit

No core return is required - this is a brand-new unit, not a reman or rebuild. Your old turbo stays with you.

KC Jetfire Stage 3r Gen 2 DBB - Key Specs

Confirm these specs match your 6.0L Power Stroke build before ordering:

If your engine, injector sizing, and part number match the table above, this is the correct turbo to add to your build.

Avoid These Common Mistakes

• Ordering Stage 3r when Stage 2r fits the build better: If your injectors are in the 190cc / 30% over range and your power target is 600-650 hp, the Stage 2r Gen 2 DBB is properly sized for that build.
• Ordering for a stock or lightly modified truck: The Stage 3r Gen 2 is engineered for heavily built applications. A Stage 1 or stock-spec turbo is a better match for stock or mildly modified trucks.
• Shipping to a CA or CO address: Orders cannot be delivered to a California or Colorado address. Confirm your delivery address is outside those states before placing the order.
• Confusing part numbers: Two part numbers are available for this turbo (300266, 302472). Verify which applies to your specific application before ordering.

6.0L Power Stroke Fitment - Stage 3r Gen 2

The KC Jetfire Stage 3r Gen 2 DBB is a 100% drop-in fit for 6.0L Power Stroke applications with no modifications required. Confirm your engine code, injector sizing, and delivery address before ordering.

Before You Order - Final Check

• Engine confirmed as 6.0L Power Stroke
• Build goal aligns with up to 205cc / 75% over injectors and 650-700 hp
• Part number verified (300266 / 302472)
• Delivery address outside CA and CO confirmed

For a 6.0L Power Stroke build running serious injector upgrades and a 650-700 hp target, the KC Jetfire Stage 3r Gen 2 DBB is the correct drop-in turbo - no core, no modifications, and the headroom your build actually needs.