Katech C7 Corvette & Grand Sport Stage 4 725HP Supercharged Installed Performance

Katech C7 Corvette & Grand Sport Stage 4 725HP Supercharged Installed Performance Package

725 HP Supercharged Performance for the C7 Corvette and Grand Sport with LT1 Engine!

Professionally Installed and Dyno-Tested Supercharged Performance for the GM LT1

The Katech C7 Corvette & Grand Sport Stage 4 725HP Supercharged Installed Performance Package is a professionally engineered forced-induction performance system designed to deliver 725 horsepower from the supercharged LT1 while maintaining refined street drivability. This comprehensive package combines a Magnuson 2650 supercharger, Katech K-Force 3 supercharger camshaft, Katech CNC-ported cylinder heads, upgraded valvetrain, Halltech STRX 2650 intake, Katech billet 103mm throttle body, upgraded supercharger drive components, supporting engine modifications, custom ECU calibration, chassis dyno calibration, and final road validation.

Unlike traditional bolt-on performance packages, Stage 4 introduces a complete supercharger system supported by extensive engine modifications. The combination of a high-capacity Magnuson 2650 supercharger, CNC-ported cylinder heads, and a dedicated forced-induction camshaft is designed to deliver substantial horsepower and torque gains while providing the foundation for a professionally engineered high-performance LT1.

Unlike purchasing individual components separately, this installed package is completed at Katech Engineering as a complete performance system. Each vehicle is inspected, professionally modified, calibrated, dyno tested, and road tested before delivery.

Specifications

Performance Highlights

• 725 HP Supercharged LT1 Performance
• Magnuson 2650 Supercharger Kit
• Halltech STRX 2650 Intake
• Katech Billet 103mm Throttle Body
• 103mm Supercharger Snout
• GripTec Upper Supercharger Pulley
• ATI Lower Supercharger Pulley
• Katech K-Force 3 Supercharger Camshaft
• Katech CNC-Ported LT1 Cylinder Heads
• Katech 5-Angle Competition Valve Job
• PSI 1516 Valve Springs
• Katech-Spec Johnson 2110-K Lifters
• Katech Billet Low-Profile Valve Covers
• Katech Billet PCV Adapter Fittings
• Katech C5R Timing Chain and Timing Chain Guide
• Katech VVT and AFM Delete Components
• ATI Harmonic Damper
• Katech 160-Degree Thermostat and Billet Housing
• Custom ECU Calibration
• Baseline and Chassis Dyno Testing
• Street Drivability Calibration
• Katech Serialized Plaque
• Professional Installation by Katech Engineering
• 1-Year / 12,000-Mile Katech Limited Warranty

Is This Package Right for You?

The Stage 4 725HP Supercharged Installed Performance Package is designed for C7 Corvette Stingray and Grand Sport owners seeking a substantial increase in horsepower and torque beyond naturally aspirated performance upgrades. By combining the Magnuson 2650 supercharger with Katech CNC-ported cylinder heads, a dedicated K-Force 3 supercharger camshaft, upgraded valvetrain components, and a complete high-flow induction system, Stage 4 transforms the LT1 into a more powerful forced-induction performance platform.

This package is ideal for enthusiasts who want the immediate throttle response and strong torque delivery associated with a positive-displacement supercharger, combined with the more aggressive engine character of an upgraded camshaft. The complete package is professionally installed, calibrated, and validated by Katech Engineering to deliver a cohesive high-performance driving experience.

• 725 HP Supercharged Performance
• Substantial Horsepower and Torque Gains
• Strong Low- and Mid-Range Torque Delivery
• Improved High-RPM Performance
• Enhanced Throttle Response
• Distinctive Supercharger and Camshaft Acoustics
• Increased Cylinder Head and Induction Airflow
• Upgraded Valvetrain and Timing Components
• Dedicated Supercharger Drive Components
• Professional Installation and Calibration
• A Complete Katech-Installed Supercharged Performance Solution

What's Included

Supercharger and Induction System

• Magnuson 2650 Supercharger Kit
• Halltech STRX 2650 Intake
• Halltech 103mm Coupler
• Katech Billet 103mm Throttle Body
• 103mm Supercharger Snout

Supercharger Drive Components

• GripTec Upper Supercharger Pulley
• ATI Lower Supercharger Pulley
• ATI Damper, Standard Drive
• Katech Dipstick Bracket

Cylinder Head System

• Katech CNC-Ported LT1 Cylinder Heads
• Katech 5-Angle Competition Valve Job
• Katech Valve Job Blend
• Cylinder Head Deck Machining, Minimum Cleanup
• GM Gen V LT4 Head Gaskets
• ARP Head Bolt Kit

Camshaft and Valvetrain

• Katech K-Force 3 Supercharger Camshaft
• PSI 1516 Valve Springs
• Katech Steel Spring Retainers
• Katech Steel Spring Locators
• Katech-Spec Johnson 2110-K Lifters
• Trend 3/8-inch, .080-Wall Pushrods, Measured to Fit
• GM Lifter Trays

Timing, VVT and AFM Delete Components

• Katech C5R Timing Chain
• Katech Timing Chain Guide
• Katech VVT Delete Gear
• Katech VVT Delete Gear Stanchion
• Katech VVT Delete Gear Bolt
• Katech VVT Delete Billet Front Cover
• Katech Billet AFM Delete Cover

Valve Covers and Crankcase Ventilation

• Katech Billet Low-Profile Valve Covers
• Katech Billet PCV Adapter Fittings
• AN Valve Cover Port Plug

Cooling System Upgrades

• Katech 160-Degree Thermostat
• Katech Billet Thermostat Housing

Engine Components, Fluids, and Service Items

• Brisk Racing 14 Spark Plugs
• GM Brake Fluid
• GM Oil Filter
• Mobil 1 0W-40 Engine Oil
• GM LS Front Seal
• GM Damper Bolt
• GM Torque Converter or Flywheel Bolts, as Applicable
• O2 Plug
• Wideband O2 Bung
• O2 Washer
• Miscellaneous Shop Supplies

Calibration and Validation

• Professional Installation
• Baseline Dyno
• HP Tuners Credits
• Chassis Dyno Calibration
• Street Drivability Calibration

Finishing Details and Warranty

• C7 Corvette Katech Serialized Plaque
• 1-Year / 12,000-Mile Katech Limited Warranty – See Terms for Details

The Katech Installation Process

Vehicle Inspection

Each vehicle is inspected before installation begins to identify any concerns that should be addressed before modification.

Baseline Dyno Testing

Baseline chassis dyno testing is performed before modifications to document incoming vehicle performance and establish a reference point for the completed package.

Professional Installation

All included components are installed by Katech technicians using established installation, machining, and assembly procedures. Cylinder head preparation, camshaft and valvetrain installation, VVT and AFM delete components, timing system upgrades, supercharger installation, drive system components, induction upgrades, and required supporting components are completed as part of the package.

Cylinder Head Preparation

The LT1 cylinder heads receive Katech CNC porting, a 5-angle competition valve job, valve job blending, and minimum-cleanup deck machining. These modifications are designed to improve cylinder head airflow and support the increased performance demands of the supercharged Stage 4 combination. GM Gen V LT4 head gaskets and ARP head bolts are included for engine reassembly.

Camshaft and Valvetrain Installation

The Katech K-Force 3 supercharger camshaft is installed with PSI 1516 valve springs, Katech steel spring retainers and locators, Katech-spec Johnson lifters, and Trend pushrods measured for proper fitment. Supporting timing components and VVT and AFM delete hardware are installed to complete the camshaft conversion.

Supercharger and Induction Installation

The Magnuson 2650 supercharger system is installed with the Halltech STRX 2650 intake, Katech billet 103mm throttle body, 103mm supercharger snout, GripTec upper pulley, ATI lower pulley, and supporting drive components. Katech billet low-profile valve covers, PCV fittings, and associated hardware are incorporated into the completed installation.

ECU Calibration

The package includes the required HP Tuners credits and custom ECU calibration appropriate for the Stage 4 725HP supercharged performance combination. Calibration is developed to support the Magnuson 2650 supercharger, upgraded camshaft, cylinder heads, valvetrain, induction components, and overall engine operation.

Dyno Calibration and Validation

Following installation, the vehicle receives chassis dyno calibration and performance validation to verify the operation of the completed package and evaluate performance gains compared to the baseline results.

Street Drivability Calibration

After dyno calibration, the vehicle is road tested and calibrated to verify throttle response, part-throttle operation, idle quality, and overall street drivability before delivery. Calibration is tailored to the increased torque output and operating characteristics of the supercharged LT1 combination.

The Katech Difference

Katech Engineering has been developing, machining, assembling, and validating high-performance engines and components since 1977. From professional motorsports programs to premium street performance packages, Katech focuses on complete engineered systems rather than random combinations of parts.

The Stage 4 725HP package takes advantage of Katech's in-house engine development, CNC machining, cylinder head preparation, professional installation, calibration, and validation capabilities to deliver a complete supercharged LT1 performance system.

Every Katech Installed Performance Package is built around professional installation, calibration, validation, and support from the Katech team.

Recommended Upgrades

• Contact a Katech Performance Specialist to discuss additional C7 Corvette LT1 performance upgrades, fuel system options, supporting drivetrain components, and available package options.

Frequently Asked Questions

Important Information

Package contents may vary as engineering improvements and component updates become available. Advertised horsepower represents engine horsepower for the specified package configuration. Actual results may vary based on vehicle condition, fuel quality, environmental conditions, and other factors.

The Stage 4 package includes extensive internal engine modifications and forced induction. Engine sound, idle characteristics, thermal demands, and operating behavior will differ from the factory configuration.

Emissions compliance and eligibility for public-road use depend on applicable federal, state, and local regulations. Customers should confirm compliance requirements before purchase and installation.

If additional repairs or recommendations are identified during inspection or installation, Katech will contact the customer before performing additional work.

The included 1-year / 12,000-mile Katech limited warranty is subject to applicable Katech warranty terms, conditions, limitations, and exclusions. See warranty terms for complete details.

Please contact a Katech Performance Specialist for current pricing, scheduling availability, compatibility, and package options.

Ready to Supercharge Your C7 Corvette?

Contact Katech Engineering to discuss your performance goals and schedule your C7 Corvette & Grand Sport Stage 4 725HP Supercharged Installed Performance Package.

Call: (586) 791-4120
Email: sales@katechengines.com