Give your factory GTP38 turbocharger the airflow it deserves with the SWAG Performance 66/88 Turbo Upgrade Kit for 1999.5-2003 Ford 7.3L Powerstroke Diesel engines.
Rather than replacing your complete turbocharger, this kit upgrades the compressor side of your existing Garrett GTP38 by replacing the restrictive factory compressor assembly with a larger 66/88 CNC-machined billet compressor wheel and a matching 4-inch anti-surge compressor housing. The result is improved airflow, increased compressor efficiency, quicker boost recovery, and the ability to support higher horsepower applications while maintaining excellent street manners.
The lightweight billet compressor wheel features a modern 6+6 blade design engineered to improve airflow across a wide operating range. Combined with the larger anti-surge housing, the upgraded compressor assembly helps reduce airflow restriction and improves compressor stability during rapid throttle transitions, towing, and higher boost operation.
Whether you're building a dependable tow rig, a responsive daily driver, or a higher-performance street truck, this upgrade provides an excellent balance of reliability, drivability, and increased airflow while retaining your factory turbocharger.
Features
- Designed for factory Garrett GTP38 turbochargers
- Fits 1999.5-2003 Ford 7.3L Powerstroke Diesel
- Upgrades factory 60/80 compressor assembly to a larger 66/88 configuration
- CNC-machined 66mm x 88mm billet aluminum compressor wheel
- Modern 6+6 blade aerodynamic design
- High-flow 4-inch anti-surge compressor housing
- Precision-machined upgraded backing plate
- Increased compressor airflow capacity
- Improved compressor efficiency
- Quicker boost response and recovery
- Helps reduce compressor surge during aggressive acceleration
- Supports higher horsepower and torque levels
- Excellent foundation for future performance modifications
- Direct-fit upgrade for compatible factory GTP38 turbochargers
Benefits
Increased Airflow
The larger 66/88 compressor moves significantly more air than the factory compressor, allowing the engine to breathe more efficiently throughout the RPM range.
Improved Turbo Response
The lightweight billet wheel reduces rotating mass while the optimized compressor housing promotes smoother airflow, helping the turbocharger recover boost more quickly during acceleration.
Greater Performance Potential
Ideal for trucks equipped with performance tuning, upgraded injectors, intake systems, intercoolers, or free-flowing exhaust components.
Better Towing Performance
Improved compressor efficiency helps maintain airflow under sustained load, making this upgrade an excellent choice for trucks that regularly tow or haul heavy loads.
Factory Turbo Compatibility
Retain your original Garrett GTP38 turbocharger while significantly improving compressor-side performance without purchasing an entirely new turbo assembly.
Kit Includes
- 4" Anti-Surge Compressor Housing
- 66/88 CNC Billet Compressor Wheel
- Precision-Machined Backing Plate
- Compressor Housing O-Ring
- Compressor Wheel Retaining Nut
- Required Installation Hardware
Ideal Applications
This upgrade is well suited for:
- Daily-driven Powerstroke trucks
- Heavy towing applications
- Performance street builds
- Larger injector upgrades
- Custom tuning
- Cold air intake upgrades
- Intercooler upgrades
- Free-flowing exhaust systems
Installation Notes
- Designed for compatible factory Garrett GTP38 turbochargers found on 1999.5-2003 7.3L Powerstroke engines.
- Turbocharger disassembly is required for installation.
- Inspect the turbocharger for shaft play, bearing wear, or oil contamination before installing new compressor components.
- Proper compressor wheel torque procedures should always be followed.
- Professional installation is recommended for best results.
Why Choose SWAG Performance?
SWAG Performance Parts is committed to delivering high-quality components engineered for diesel enthusiasts who expect dependable performance without paying premium-brand pricing. Every component in this kit is selected to provide excellent fit, durability, and long-term reliability while helping your 7.3L Powerstroke reach its full potential.
Whether you're replacing worn compressor components or upgrading for increased airflow and future power goals, this 66/88 Turbo Upgrade Kit delivers the performance, reliability, and value today's Powerstroke owners demand.
Recommended Add-On Products
Complete your turbo upgrade with these complementary components:
- SWAG Performance Turbo Rebuild Kit
- SWAG Performance High-Flow Intake System
- SWAG Performance Intercooler Boot & Pipe Kit
- SWAG Performance Exhaust Manifolds & Up-Pipes
- Turbo Pedestal Rebuild Kit
- Turbo Installation Gasket Kit
- EBPV Delete Components (where applicable)
- High-Flow Intake Plenum Upgrades
Optional Powder Coat Finish Available
Customize your compressor housing with a durable, professional-grade powder coat finish using Prismatic Powders.
We stock a selection of popular colors (see the final product image for our in-stock color chart), and thousands of additional Prismatic Powders colors are available by special order.
Please Note:
- Powder coating will typically add 2–3 business days to order processing.
- Single-stage colors: Add $50.00
- Two-stage/custom finishes: Add $75.00
