KC300x Stage 2 Turbo (63/73) - 7.3 Powerstroke (L99-03)

KC300x Stage 2 Turbo (63/73) - 7.3 Powerstroke (L99-03)

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1 Year

Unlimited Miles Limited Warranty

KC300x Stage 2 Turbo (63/73) - 7.3 Powerstroke (L99-03)

KC300x Stage 2 Turbo (63/73) - 7.3 Powerstroke (L99-03)

63 reviews

SKU 300223

Regular price $ 1,240.00
Regular price Sale price $ 1,240.00


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Turbo Cover

Not available for sale in the state of California, Click here to read Emissions Notice

1 Year

Unlimited Miles Limited Warranty


KC300x Stage 2 L99

Gen 2

Supports: Up to 205cc/30% injectors


Features & Details: 

  • Powder Coating can take up to 3 weeks before it ships
  • 100% drop in turbo (no modifications required)
  • 63mm 7x7 SXE style compressor wheel with extended tip technology
  • 73mm SXE style turbine wheel
  • 4" ported compressor housing with drilled anti-surge for high flow
  • High Flow Non-EBPV outlet flange
  • Adjustable Wastegate Actuator for increased boost control
  • Upgraded 360 Thrust Journal Bearing Design
  • Comes with all gaskets and o-rings to install
  • Comes with new 4" intake boot


Improve your 7.3 Powerstroke engine's performance with the KC300x Stage 2 63/73 Gen 2 Turbo. This turbo features a 4" ported housing with drilled anti-surge for better flow, a 63mm 7x7 SXE style compressor wheel with extended tip technology, and a 73mm SXE style turbine wheel. The KC300x is a reliable journal bearing drop in turbo perfect for increasing your 7.3 Powerstroke's performance. 

This turbo will surprise you at how much it will wake up your 7.3! We have torture tested it for longevity, proven its capability on the dyno, and at the Race Track. The 1.0 A/R Housing is intended to cool your EGTs above 3000 RPMS, for dedicated tow rigs and daily drivers the .84 A/R Housing will provide a quicker spool and cooler EGT's below 3000 RPMs.

**We Highly Recommend adding these products for best results:**

  1. Upgrading your Up-Pipes
  2. Upgrading EBPV Pedestal 
  3. Running a Hydra Programming Chip

**EXHAUST BRAKES:  We get asked a lot about exhaust brakes and if they work with our turbos.  We have found that some brands have clearance issues and might cause the brake to hinder performance, rub the turbine wheel, or cause other issues.  These brakes typically use some sort of flapper to close which causes extreme exhaust back pressure to aide in braking.  This can be hard on a turbo and motor and is not recommended.  It will be up to the customer to verify fitment and functionality.**


Click here for more information on the KC300x in Diesel World Magazine.

**These turbos come sand cast unless specifically requested. You can add a polished cover for an additional $250. Two week lead time on all polished covers**

**Our turbos are designed to fit directly in 7.3 equipped pick-up trucks. Although our turbos can drop into 7.3 equipped Vans, you will need to modify the turbo intake boot and down-pipe for proper fitment**

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Customer Reviews

Based on 63 reviews
Richard Falkenberg

Fast shipping and turbo fit perfect and made a huge difference in horsepower. Great product would by again

Matt Ellsworth
Great upgrade over stock!

Picked up the Stage 2 turbo, up pipes and the S &B CAI, what an improvement the turbo made. Even with stock injectors running the 140 hydra tune the truck is a beast. After the trans is built I’ll throw in the 205/30 UDP injectors and see how much more that wakes the truck up. Thank you for the great products KC Turbo and cre!


It's was very easy to install and gave my truck a lot more horsepower.

Blown Away

Now being from Canada... I unfortunately could not buy right off the site. Even still the boys at KC helped. Exchanged a few emails, talked about plans and turbo sizing. They answered everything, including giving me piece of mind that the stage 2 would work with stock injectors. I was skeptical.

Installed last night... had a few boost leaks (up pipes and
charge air cooler clamp). Fixed those and boy oh boy what a difference.

On the highway at 60miles an hour EGT is only 100-150 degrees hotter than stock turbo (which is to be expected on stock injectors and I was told about), but once you get a bit higher in the RPM and the turbo lights EGTS level out and even on my hot tune at 35psi I run out of gear before the EGT goes above 1050.

I still need to do injectors as mine are higher mileage but even on stock sticks I am blown away with the performance of this thing.

The new OE style turbo inlet boot is perfect as well, gives the turbo a stock appearance.

deven engstrom
kc turbo again !

I ordered a kc 300x stage 2 turbo for my 7.3 powerstroke. kc is fast at shipping easy to work with and very helpful!! I own my own repair business i will defiantly be using kc turbo again!! thank you