KC300x G3 Stage 1 Turbo - 7.3 Powerstroke (L99-03)
KC300x G3 Stage 1 Turbo - 7.3 Powerstroke (L99-03)
1 Year
Unlimited Miles Limited Warranty
KC300x G3 Stage 1 Turbo - 7.3 Powerstroke (L99-03)
KC300x G3 Stage 1 Turbo - 7.3 Powerstroke (L99-03)
97 reviews
SKU 302523
IN STOCK
Not available for sale in the state of California, Click here to read Emissions Notice
1 Year
Unlimited Miles Limited Warranty
KC300x Stage 1 L99-03
Gen 3
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)
- Dyno Proven Power Gains
- Redesigned Gen 3 7x7 SXE style compressor wheel with upgraded aero
- Thick Shaft Gen 3 SXE style turbine wheel
- Redesigned quick spool 0.70AR Ported Compressor Cover
- Improved MAP Groove, Anti-Surge Ring, and Volute Shape
- Redesigned 0.91AR Turbine Housing with upgraded volute technology for Quicker Spool & More Top End Power
- Spools FASTER than the old 0.84AR and flows MORE air than the old 1.0AR due to this radical redesign
- 200% Larger Thrust and Journal Bearings
- Thicker turbine shaft to accommodate larger bearings and higher boost and HP levels. Stock shaft sizes can deflect and result in catastrophic failures
- Redesigned Bearing Housing with integrated cast iron backing plate for improved high speed stability by reducing deflection
- Added Steel Thrust Insert to Reinforce oil slinger and piston seal Contact Areas & Eliminate Bearing Fatigue
- High Flow Non-EBPV outlet flange
- Redesigned Round-Top Wastegate Actuator for increased boost control
- Comes with all gaskets and o-rings to install
- Comes with newly upgraded 4" intake boot with better fitment over previous designs
Description:
Improve your 7.3 Powerstroke engine's performance with the KC300x Stage 1 Gen 3 Turbo. This turbo features a 4" ported housing with drilled anti-surge for better flow, a completely redesigned Gen 3 7x7 SXE style compressor wheel with extended tip technology and with upgraded aero to aid in quick spool, and a SXE style turbine wheel with a thicker shaft inside of completely redesigned compressor and turbine housings.
The Gen 3 KC300x features a .91 AR Turbine housing and a 0.70 AR compressor cover. Originally a 1.0 AR compressor cover, we changed it to a .70 AR cover with redesigned map groove, anti surge ring, volute shape and style with modern turbo technology. The turbine housing was previously available in .84 and 1.0ar; both are inefficient when compared to modern turbos. We took inspiration from the latest turbochargers in the market and applied their turbine housing design , flow path, volute shape, and material density to come up with our own 0.91AR turbine housing. This turbine housing was proven to spool up faster AND make more top end power when compared to either previous option.
The KC300x is a reliable journal bearing drop in turbo perfect for increasing your 7.3 Powerstroke's performance. This redesigned bearing housing and backing plate design to fit 200% LARGER thrust bearings and upgraded wider and taller journal bearings. Its upgraded steel thrust insert replaces the aluminum backing plate to keep expansion rates the same leading to more consistent turbocharger function. It's bearing housing has increase stability, backing plate stronger and cast into bearing housing integrated for improved rigidity reduces backing plate deflection and distortion under extreme heat and pressure
We spent years in R&D to bring the most drop in power to your truck! Not only does this new turbo design outperform anything else on the market, but it has also upgraded all weak points in the stock turbo, improving reliability at elevated HP levels. For larger than 205/30s injectors, we recommend you check out our KC300x G3 Stage 2!
So what size is the new KC 300x Gen 3 Stage 1? We are not going to tell you, but I will tell you this turbo will outperform any other drop in turbo on the market guaranteed. Better in every way and a perfect match from stock to 205/30 injectors. If you really HAVE TO KNOW the size for some reason then give us a call and we can go over sizing options on the phone.
**We Highly Recommend adding these products for best results:**
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. It will be up to the customer to verify fitment and functionality.
**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**
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. This turbocharger will not fit OBS or E99 trucks without modification.
We cannot guarantee fitment with all variations of aftermarket parts like fuel systems, plenums, piping kits, etc.
This turbo is designed to make the most of your power for your 7.3 powerstroke. If you have or want bigger injectors, check out our KC300x G2 Stage 2!
Share

I started out by building a 02 f350 and a 00 excursion, made them identical to each other but I think they sent larger injectors on the f350. I started the build by going with injectors and turbo from a different outfit that sold new injectors hopped up. It was fine and all but the EGT's were always hot and had to watch gauges whenever towing and even on flat ground sometimes. I also noticed my MPG dropped by 2-3, even empty the MPG was down.
I had a ton of black smoke problems with the f350 cause its my work truck and was really bad in the summers I ended up spending about $5k worth mechanics trying every single issue seeing if i missed some sort of leak or bad sensor. Then KC turbo had the video of the turbo shootout and it popped into my feed and got me questioning things, dumped more money into the f350 with intercooler which made a little bit of difference with the smoke and helped the EGT's. After that got the S&B dry filter intake and same results a little bit of improvement. Finally the KC300 gen 3 stage 1 turbo showed up, that made the largest improvement before fall hit. The black smoke is very manageable, but the performance is night and day difference and I do not even need to worry about the EGT's. My truck is always full of tools and has a steel service box, with the new turbo my shifts are now 1750-2000 rpms and I do not have to downshift going up hills with a trailer. I also gained back about 2-3mpg towing or empty, I think towing a heavy load my EGT's barely hit 1200 with all the mods and keep the same speed. With my other set up it would instantly jump to 1400 and I would have to slow down and down shift if I wasn't watching the EGT's like a hawk.
Just got the KC300 gen3 stage 1 in my excursion, its has very similar results. the only difference that I have noticed is when my tune is set to performance the KC is a little slower on take off, the other turbo hits so hard on take off it almost flips your neck back.
With the KC turbo vs other brand, it will make 7-10 more pounds of boost in the 1500-1750rpm range, 10-15 more pounds 1750-2000rpms and will max out on my gauge at 37psi when hitting it hard, my other brand turbo would max out at 25psi. Cruising speed at 60mph I would see a 1-2psi improvement with about 100 EGT's lower, for me this KC300 gen 3 stage 1 is the perfect setup in the mountain country.
I was experiencing high egt's and low-grade performance. This turbo made a drastic difference from stock and I am pulling heavy loads with optimal exhaust gas temps. I paired with the S&B air intake and the truck pulls itself on the grades I previously struggled with. We'll worth the money to keep your engine cool and hopefully last a million miles 😎
Now I am saving up for injectors!
1999 F350 7.3 Auto 4x4 CC SB Lariat, 6 Position Chip, BDS Lift Suspension, Mishimoto Transmission Cooler, Black Rhino Armory, BFG 35, CW Bumper, Banks Elbow, RiffRaff Bellowed Up-Pipe, BTS Transmission, KC300x Stage 1
Awesome turbo runs cooler at idle , and holds 3 lbs manifold psi cruising , comes to life when needed , to early to tell on mileage.
Amazing!! Well worth every dollar spent.
Great product works great!
