KC Turbos NEW GEN 2 KC300x Stage 3 Turbo (66/73) 7.3 POWERSTROKE (L99 - 03)
KC Turbos NEW GEN 2 KC300x Stage 3 Turbo (66/73) 7.3 POWERSTROKE (L99 - 03)
SKU:300907
Couldn't load pickup availability
🔒 Secure checkout with:
SSL Encrypted • Fast Shipping • Easy Returns
🔔 Important Notice: This product may be temporarily out of stock. Orders are still accepted, but please note that additional processing time may be required before shipping. Estimated lead time may vary depending on supplier availability. If you need the item urgently, please contact us to confirm current availability.
Supports: Up to 238cc/80% injectors
Features & Details:
- 100% drop in turbo (no modifications required)
- 66mm 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
Description:
Improve your 7.3 Powerstroke engine's performance with the KC300x Stage 3 66/73 Gen 2 Turbo. This turbo features a 4" ported housing with drilled anti-surge for better flow, a 66mm 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! KC 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.
This turbo is not recommended for heavy towing. If you are looking for a turbo that can be used for heavy towing, but still are looking a large boost in performance, check out the L99 KC300x Stage 2.
We Highly Recommend adding these products for best results:
- Upgrading your Up-Pipes
- Upgrading EBPV Pedestal
- Running a Hydra Programming Chip
EXHAUST BRAKES: We get asked a lot about exhaust brakes and if they work with KC 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. -KC Turbos
**Pictured is a polished cover, these turbos come with the duller factory finish unless specifically requested. You can add a polished cover for an additional $250. Two week lead time on all polished covers**
**KC 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**
Share

📌 Before You Complete Your Purchase Please review the important information below regarding product accuracy, pricing, inventory, and return policies.
-
Terms & Conditions (TOS)
Product Information Accuracy Disclaimer:
"While we strive for accuracy, FrankBuilt Performance does not warrant that product descriptions, prices, or other content is error-free. In the event of an error, we reserve the right to cancel or correct any order placed for the incorrectly listed item."
Price Changes:
"Prices are subject to change without notice. Errors in pricing may occur and we reserve the right to refuse or cancel orders placed at incorrect prices."
Inventory Disclaimer:
"Inventory availability is not guaranteed. If an item becomes unavailable after an order is placed, we will contact you as soon as possible to offer alternatives or a full refund."
-
Shipping & Returns Policy
Wrong Parts Received / Ordered:
"It is the customer’s responsibility to verify product fitment before placing an order. If you receive the wrong item due to an error in our listing, we will work to resolve the issue. If the wrong item is ordered by mistake, restocking fees may apply."
Restocking Fees and Return Eligibility:
"Returns may be subject to a restocking fee. Items must be unused and in original packaging."