KC38R "E99 Tiger Turbo" Dual Ball Bearing 63/73 (Early 99) – JeliBuilt Performance, LLC

KC38R "E99 Tiger Turbo" Dual Ball Bearing 63/73 (Early 99)


  • Brand: KC Turbo
  • Availability: In Stock
Turbine A/R Option
Add Non-EBPV Pedistal

Recommended injectors: 180CC/30%

Minimum injectors: 160CC/Stock Nozzle

Maximum injectors: 205CC/30%


KC38r specs:

  • 4" ported housing with drilled hole anti-surge for high flow
  • 63mm 7x7 sxe style compressor wheel with extended tip technology
  • 73mm SXE style turbine wheel Big Head Wastegate Actuator for elevated boost control
  • High Flow deleted EBPV outlet flange
  • Dual Ball Bearing turbo (rebuildable)
  • 100% drop in turbo
  • Comes with all gaskets and orings to install
  • Comes with new 4" intake boot


Well it is finally here, KC Turbo spent the last year working on updates on their popular KC38r turbo. They kept hearing about how great the s366sxe was, but with it being a standard rotation t4 turbo, it can be a little expensive to install on these trucks because it requires a "t4 kit".  KC wanted to see how a reverse rotation, drop in, 366sxe turbo would perform in the dual ball bearing KC38r turbo frame.1 year later, the KC38r 366 was born and the results are AMAZING!  It spools faster, runs cooler, and makes more power.  All testers reported how much cooler and cleaner their trucks run with the updated version.  Some reported a 200 degree drop in EGTs.  The power comes on so much stronger and quicker with this new turbo, which makes towing and daily driving so much better.


Although the turbo still has a 63mm compressor wheel, it is drastically different.  It is a larger, 7x7 wheel and is modeled after the 366sxe compressor wheel... same profile, shape, and blade style, except it is reverse rotation.  This wheel is not only bigger, but stronger.  It has thicker blades, thicker hub, and thicker backing, this makes it much less prone to fatigue and wheel burst.


The turbine wheel is much larger, 73mm vs the old 70mm.  It is also a much taller wheel with larger blades.  It does not just share the same "dimensions" of the sxe wheels.  It is the same shape, size, thickness, and blade profile as the s366sxe turbine wheel. Please see the pictures to fully understand how much different the new wheel is. (even though the turbine wheel is much larger, it still spools much faster.  It is crazy what modern turbo technology can do to a 20 year old turbo design).  Most people focus too much on the "compressor wheel" because that is what everyone can see, but the fact of the matter is 90% of the "turbo magic" comes from the turbine side of the turbo, and we did our due diligence to make this the best option on the market.


KC also increased the thickness of the shaft to support the extra power and help make our turbos even more robust.  No other drop in 7.3 turbo on the market runs a larger shaft.  6.4mm vs 7.5mm