KC300x Stage 1 Turbo (63/68) - 7.3 Powerstroke (L99-03)

KC300x Stage 1 Turbo (63/68) - 7.3 Powerstroke (L99-03)

Skip to product information
1 of 7

1 Year

Unlimited Miles Limited Warranty

KC300x Stage 1 Turbo (63/68) - 7.3 Powerstroke (L99-03)

KC300x Stage 1 Turbo (63/68) - 7.3 Powerstroke (L99-03)

48 reviews

SKU 300235

Regular price $ 1,190.00
Regular price Sale price $ 1,190.00


Choose A/R Size
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 1 L99

Gen 2

Supports: Up to 180cc/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
  • 68mm 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 1 63/68 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 68mm 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, these will retain the OEM feature if the vehicles calibration allows and is setup for it. 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. 

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**

    View full details

    Customer Reviews

    Based on 48 reviews
    Kenneth E Brown
    Amazing service and products

    Originally I purchased the balanced wheel assembly to rebuild my stock GTP38. I had a hard time fitting the rebuild kit in the turbo. I called KC and they walked me through the issue and how to fix it. When I realized my turbo was junk and had to be replaced I purchased a kc300x stage 1. Amazing turbo and increase boost output from my old turbo by 10-12 lbs. Chris is an amazing guy. He went out of his way to make sure his customer was taken care of. Big shout out to KC for being what all businesses should be. Customer focused with a superior product.


    I have not installed it yet as i learned upon reading the instructions it Hass to be installed with a fresh oil change. BUT it looks really REALLY cool sitting on my work bench. I instinctively make turbo noises every time i see it. 3k more miles to go…

    Awesome upgrade

    Threw in with new up pipes and pedestal. Sounds great and air flow is certainly improved. Perfect match with my 5” exhaust and banks air intake.

    Mathew W.

    Spools great and sounds good. Upgrade from my wicked wheel 2 in the stock turbo for sure.

    Chris Brelje

    Awsome service guys