Elevate your 7.3 Powerstroke’s performance with the KC300x Gen 3 Stage 1 Turbo (302523).

After years of R&D, KC Turbos completely re-engineered the KC300x from the ground up. The Gen 3 Stage 1 delivers faster spool-up, stronger mid-range pull, and better top-end power than previous versions — all while remaining a true 100% drop-in replacement for 1999.5–2003 7.3L Powerstroke trucks.

This turbo features a 4" ported compressor housing with drilled anti-surge, a completely redesigned Gen 3 7x7 SXE-style compressor wheel with extended tip technology and upgraded aerodynamics, and a thick-shaft SXE-style turbine wheel inside fully re-engineered compressor and turbine housings. The result is quicker response, reduced turbo lag, and the ability to support up to 205cc/30% over injectors with excellent drivability.

Key engineering upgrades include a 0.70 AR quick-spool ported compressor cover (with improved MAP groove and anti-surge ring) and a 0.91 AR turbine housing that spools faster than the old .84 AR while flowing more air than the previous 1.0 AR. KC also upgraded the bearing system with 200% larger thrust and journal bearings, a thicker turbine shaft, and a redesigned bearing housing with integrated cast-iron backing plate and steel thrust insert for superior high-boost reliability.

Whether you’re daily driving, towing, or building a strong street truck, the KC300x Gen 3 Stage 1 wakes up your 7.3 with responsive boost and proven dyno gains — all without any modifications required.

Recommended for: 180/0 up to 205cc/30% over. For larger injectors, step up to the KC300x Gen 3 Stage 2.

Key Features & Benefits

• Supports 180/0 to 205cc / 30% over injectors with excellent drivability
• 100% Drop-In Replacement — No modifications required on 1999.5–2003 Super Duty trucks
• Dyno-Proven Power Gains — Faster spool and stronger performance across the RPM range
• Gen 3 7x7 SXE-Style Compressor Wheel with upgraded aero and extended tip technology for quicker spool
• Thick-Shaft Gen 3 SXE-Style Turbine Wheel for improved durability at higher boost/HP levels
• Redesigned 0.70 AR Ported Compressor Cover with improved MAP groove, anti-surge ring, and volute shape
• Redesigned 0.91 AR Turbine Housing — Spools faster than old .84 AR and flows more than old 1.0 AR
• 200% Larger Thrust & Journal Bearings plus thicker turbine shaft for enhanced reliability
• Redesigned Round-Top Wastegate Actuator for better boost control
• High-Flow Non-EBPV Outlet Flange included
• Newly Upgraded 4" Intake Boot with improved fitment + all gaskets and O-rings

Fitment

• Fits: 1999.5 – 2003 Ford 7.3L Powerstroke (Late 99–03 Super Duty F-250 / F-350 / F-450 / Excursion)
• Vans: May require intake boot and downpipe modifications
• Note: We cannot guarantee fitment with all aftermarket fuel systems, plenums, or piping kits. Some exhaust brake designs may have clearance or performance issues — verify before ordering.