Katech C6 ZR1 Corvette Stage 4 950HP Installed Performance Package

Katech C6 ZR1 Corvette Stage 4 950HP Installed Performance Package

950 HP Supercharged LS9 Performance with Kong 2650 Supercharger, Katech CNC-Ported Cylinder Heads, LS9 Camshaft, Upgraded Fuel System, and Professional Dyno Tuning!

950 HP Supercharged Performance for the Ultimate C6 ZR1 Build

The Katech C6 ZR1 Corvette Stage 4 950HP Installed Performance Package is engineered for enthusiasts seeking an extraordinary level of performance from Chevrolet's legendary 6.2L supercharged LS9 V8. Combining a Kong LS9 2650 supercharger, Katech CNC-ported cylinder heads, Katech LS9 camshaft, upgraded valvetrain, enhanced fuel delivery, and professional calibration, Stage 4 is designed to deliver an impressive 950 engine horsepower.

At the heart of this package is the Kong LS9 2650 supercharger and matching Kong LS9 supercharger lid. The larger-displacement supercharger replaces the factory LS9 supercharger assembly, providing the airflow capability needed to support substantially higher horsepower output.

A Katech 112mm throttle body and Kong carbon fiber air intake complement the larger supercharger by providing an upgraded induction path. These components work together to support the increased airflow demands of the 950HP combination.

Supercharger drive upgrades include a GripTec supercharger pulley, Gates HD supercharger belt, ATI LS9 damper, and ATI LS9 lower pulley. These components support the upgraded supercharger drive configuration, with the GripTec pulley designed to improve belt traction and help reduce unwanted belt slip under load.

To support the increased airflow and horsepower potential, Stage 4 includes a DSX auxiliary fuel pump and FIC 850cc fuel injectors. These components provide additional fuel delivery capability compared with the factory configuration and are incorporated into the professional engine calibration.

Beyond the supercharger and fuel system upgrades, Stage 4 includes substantial internal engine improvements. Katech CNC-ported cylinder heads receive a competition valve job and hand-blend valve job, while a Katech LS9 camshaft works with an upgraded valvetrain to support increased airflow and performance.

The valvetrain combination includes PSI1511 valve springs, Katech tool steel retainers, Katech steel locators, Katech valve seals, Johnson 2110-K lifters with Katech-specified lifter bore clearance, a Katech C5R timing chain, GM lifter trays, and Trend 3/8-inch, .080-wall pushrods.

Kong LS9 head studs and GM LS9 head gaskets are included as part of the cylinder head installation, providing the specified cylinder head fastening hardware for the upgraded engine configuration.

Highly Recommended E85 Flex Fuel Upgrade: For customers looking to maximize the performance potential of their Stage 4 C6 ZR1, Katech also offers an optional E85 flex fuel package. E85's higher effective octane and charge-cooling characteristics can provide additional knock resistance, allowing for greater performance potential when supported by the appropriate fuel system and calibration. This upgrade is highly recommended for customers seeking maximum horsepower from their supercharged LS9. The E85 flex fuel package is available separately and is not included in the standard Stage 4 package. Contact Katech Sales for additional information, compatibility, and pricing.

Professional installation, baseline chassis dyno testing, HP Tuners calibration, chassis dyno tuning, and street drivability calibration are included to complete the package.

Stage 4 also includes a Katech serialized plaque and a Katech 1-year / 12,000-mile limited warranty, subject to applicable warranty terms and conditions.

Specifications

Performance Highlights

• 950 HP Supercharged LS9 Performance
• Designed for Chevrolet C6 Corvette ZR1 Models
• Kong LS9 2650 Supercharger
• Kong LS9 Supercharger Lid
• Katech 112mm Throttle Body
• Kong Carbon Fiber Air Intake
• GripTec Supercharger Pulley
• Gates HD Supercharger Belt
• ATI LS9 Damper and Lower Pulley
• DSX Auxiliary Fuel Pump
• FIC 850cc Fuel Injectors
• Optional E85 Flex Fuel Package Available and Highly Recommended for Maximum Performance
• Katech LS9 Camshaft
• Katech CNC-Ported LS9 Cylinder Heads
• Katech Competition Valve Job
• Katech Hand-Blend Valve Job
• PSI1511 Valve Springs
• Katech Tool Steel Retainers and Steel Locators
• Katech Valve Seals
• Johnson 2110-K Lifters
• Katech C5R Timing Chain
• Trend 3/8-Inch, .080-Wall Pushrods
• Kong LS9 Head Stud Kit
• GM LS9 Head Gaskets
• NGK BR7EF Spark Plugs
• 160-Degree Thermostat
• Professional Installation Labor Included
• Baseline Chassis Dyno Testing
• HP Tuners Credits
• Chassis Dyno Tuning and Street Calibration
• Katech Serialized Plaque
• Katech 1-Year / 12,000-Mile Limited Warranty

Is This Package Right for You?

The Katech C6 ZR1 Stage 4 950HP package is designed for owners seeking substantially greater performance than the factory-supercharged LS9 configuration can deliver with basic pulley and tuning upgrades.

Unlike earlier stages that focus primarily on optimizing the factory supercharger, Stage 4 replaces the original unit with a larger Kong LS9 2650 supercharger and matching lid. This provides the airflow capacity needed to support the package's significantly higher horsepower target.

The upgraded induction system, fuel delivery components, cylinder heads, camshaft, and valvetrain are selected to work together as a complete performance combination.

For customers who want to push the combination even further, Katech highly recommends considering the optional E85 flex fuel package. With the appropriate fuel system configuration and calibration, E85 can provide increased knock resistance and additional performance potential compared with conventional pump gasoline.

This package is ideal for enthusiasts looking for extreme supercharged acceleration, aggressive engine character, and a comprehensive LS9 performance build installed and calibrated by Katech Engineering.

• 950 HP Supercharged Performance
• Larger-Displacement Kong 2650 Supercharger
• Upgraded Air Intake and 112mm Throttle Body
• Enhanced Supercharger Drive System
• DSX Auxiliary Fuel Pump and FIC 850cc Injectors
• Katech CNC-Ported Cylinder Heads
• Performance LS9 Camshaft
• Upgraded Valvetrain Components
• Head Stud Fastening System
• Optional E85 Flex Fuel Upgrade for Additional Performance Potential
• Professional Installation and Dyno Calibration
• Street Drivability Calibration

What's Included

Supercharger and Induction Upgrades

• Kong LS9 2650 Supercharger
• Kong LS9 Supercharger Lid
• Katech 112mm Throttle Body
• Kong Carbon Fiber Air Intake

Supercharger Drive System

• GripTec Supercharger Pulley
• Gates HD Supercharger Belt
• ATI LS9 Damper
• ATI LS9 Lower Pulley

Fuel System Upgrades

• DSX Auxiliary Fuel Pump
• FIC 850cc Fuel Injectors

Cylinder Head and Camshaft Upgrades

• Katech LS9 Camshaft
• Katech CNC-Ported Cylinder Heads
• Katech Competition Valve Job
• Katech Hand-Blend Valve Job
• Kong LS9 Head Stud Kit
• GM LS9 Head Gaskets

Valvetrain and Timing Components

• PSI1511 Valve Springs
• Katech Tool Steel Retainers
• Katech Steel Locators
• Katech Valve Seals
• Johnson 2110-K Lifters with Katech-Specified Lifter Bore Clearance
• Katech C5R Timing Chain
• GM Lifter Trays
• Trend 3/8-Inch, .080-Wall Pushrods
• ARP Cam Bolts

Ignition and Cooling Components

• NGK BR7EF Spark Plugs
• 160-Degree Thermostat

Engine Hardware, Gaskets and Seals

• GM Damper Bolt
• GM LS Front Seal
• GM LS Front Cover Gasket
• GM LS Valley Cover Gasket
• GM LS Valve Cover Gasket
• GM LS Water Pump Gasket
• GM LS Coolant Crossover O-Ring

Engine Fluids and Maintenance Components

• GM UPF48 Oil Filter
• Mobil 1 5W-30 Engine Oil

Wideband Tuning Components

• O2 Plug
• Wideband O2 Bung
• O2 Washer

Calibration and Dyno Services

• Baseline Dyno Testing
• HP Tuners Credits
• Street Calibration Service
• Chassis Dyno Tuning

Installation and Finishing Details

• Professional Installation Labor
• Shop Supplies
• Katech Serialized Stage 4 Plaque (Confirm)
• Katech 1-Year / 12,000-Mile Limited Warranty - See Terms for Details

Optional E85 Flex Fuel Package - Highly Recommended

Maximize the Performance Potential of Your Stage 4 C6 ZR1.

For customers seeking the highest possible performance from their supercharged LS9, Katech offers an optional E85 flex fuel package that is highly recommended for the Stage 4 950HP combination.

E85 provides several advantages for high-performance supercharged engines, including increased knock resistance and improved charge-cooling characteristics compared with conventional pump gasoline. When paired with the appropriate fuel system components and professional calibration, these benefits can support more aggressive engine tuning and increased horsepower potential.

A properly configured flex fuel system can also allow the engine calibration to account for varying ethanol content, providing additional flexibility for customers who use different gasoline and ethanol fuel blends.

Because ethanol-based fuels require greater fuel volume than gasoline, additional fuel system considerations may be necessary depending on the vehicle's configuration and performance goals. The standard FIC 850cc injectors and DSX auxiliary fuel pump should be evaluated for the intended ethanol content and horsepower target. Katech can determine the appropriate flex fuel components, fuel system capacity, and calibration requirements for your specific build.

The E85 flex fuel package is an optional upgrade and is not included in the standard Stage 4 950HP package. Final horsepower output will depend on fuel composition, vehicle configuration, fuel system capability, and calibration.

Contact Katech Sales at (586) 791-4120 or sales@katechengines.com for additional information, pricing, and availability of the E85 flex fuel package.

The Katech Installation Process

Vehicle Inspection and Baseline Dyno

Before modifications begin, the vehicle is evaluated for existing mechanical concerns, previous modifications, and conditions that may affect installation or calibration. Baseline chassis dyno testing documents the vehicle's incoming performance and provides a reference for evaluating the completed Stage 4 package.

Kong LS9 2650 Supercharger Installation

The factory LS9 supercharger is replaced with the Kong LS9 2650 supercharger and matching Kong LS9 supercharger lid. The larger-displacement supercharger provides increased airflow capability to support the Stage 4 performance target.

Katech 112mm Throttle Body and Kong Carbon Fiber Intake

A Katech 112mm throttle body and Kong carbon fiber air intake are installed to provide an upgraded induction path for the larger supercharger. These components help support the airflow requirements of the 950HP combination.

Supercharger Drive System Upgrades

The supercharger drive system is upgraded with a GripTec supercharger pulley, Gates HD supercharger belt, ATI LS9 damper, and ATI LS9 lower pulley. These components support the increased performance demands of the Kong 2650 supercharger.

DSX Auxiliary Fuel Pump Installation

A DSX auxiliary fuel pump is installed to supplement the vehicle's fuel delivery capability. This upgrade supports the increased fuel requirements of the higher-output supercharged LS9 engine.

FIC 850cc Fuel Injector Installation

FIC 850cc fuel injectors are installed to provide additional fuel delivery capacity compared with the factory injectors. The upgraded injectors are incorporated into the engine calibration, with fuel system performance verified for the final operating configuration.

Katech CNC Cylinder Head Porting

The LS9 cylinder heads receive Katech CNC porting to improve airflow and support the increased demands of the larger supercharger and performance camshaft.

Katech Competition and Hand-Blend Valve Jobs

The cylinder heads receive a Katech competition valve job and hand-blend valve job. These services complement the CNC porting and help optimize airflow through the cylinder heads.

Katech LS9 Camshaft Installation

The factory camshaft is replaced with a Katech LS9 camshaft selected for the Stage 4 supercharged combination. The camshaft works with the upgraded cylinder heads and valvetrain to support increased engine performance.

Upgraded Valvetrain Installation

PSI1511 valve springs, Katech tool steel retainers, Katech steel locators, and Katech valve seals are installed to support the performance camshaft.

Johnson 2110-K lifters with Katech-specified lifter bore clearance, GM lifter trays, and Trend 3/8-inch, .080-wall pushrods complete the listed valvetrain components.

Katech C5R Timing Chain Installation

A Katech C5R timing chain and ARP cam bolts are installed as part of the camshaft and timing system upgrades.

Kong LS9 Head Stud Installation

The cylinder heads are installed using the Kong LS9 head stud kit and GM LS9 head gaskets. The head stud fastening system provides the specified cylinder head retention hardware for the Stage 4 configuration.

ATI Damper and Lower Pulley Installation

The ATI LS9 damper and lower pulley are installed as part of the upgraded supercharger drive system. A GM damper bolt is included for the associated installation.

NGK BR7EF Spark Plug Installation

NGK BR7EF spark plugs are installed as part of the ignition system preparation for the higher-output supercharged LS9 configuration.

Cooling System Service

A 160-degree thermostat is installed, with GM Dex-Cool coolant included for the associated cooling system service. The thermostat changes the temperature at which coolant circulation begins but does not independently guarantee a specific operating temperature.

Engine Reassembly and Fluid Service

The package includes a GM LS front seal, front cover gasket, valley cover gasket, valve cover gasket, water pump gasket, and coolant crossover O-ring. Mobil 1 5W-30 engine oil and a GM UPF48 oil filter are included for the associated engine service.

Wideband Tuning Preparation

The included wideband O2 bung, plug, and washer provide provisions for wideband oxygen sensor use during the tuning process.

HP Tuners Calibration

Using HP Tuners software and included credits, Katech calibrates the LS9 engine management system for the Kong 2650 supercharger, DSX auxiliary fuel pump, FIC 850cc fuel injectors, Katech LS9 camshaft, CNC-ported cylinder heads, and other Stage 4 modifications.

Chassis Dyno Tuning

The vehicle receives chassis dyno tuning to evaluate engine performance and refine the calibration. Dyno testing allows Katech to assess the completed package and compare performance against the baseline results. Fuel delivery and operating conditions are evaluated as part of calibration for the completed configuration.

Street Drivability Calibration

Following dyno tuning, the vehicle receives street calibration to refine throttle response, part-throttle operation, idle quality, and general drivability. Particular attention is given to the operating characteristics of the upgraded supercharger, camshaft, and fuel system.

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 950HP package combines Katech's cylinder head machining capabilities, performance camshaft selection, carefully chosen supercharger and fuel system components, professional installation, and calibration to deliver a comprehensive LS9 performance solution.

Rather than relying on supercharger boost alone, Stage 4 addresses airflow, fuel delivery, cylinder head performance, valvetrain capability, and engine calibration as an integrated high-horsepower combination.

For customers looking to maximize the package's performance potential, the available E85 flex fuel upgrade provides an additional opportunity to optimize the supercharged LS9 for ethanol-blended fuel. Katech highly recommends discussing this option with a Performance Specialist when planning a Stage 4 build.

Recommended Upgrades

E85 Flex Fuel Package - Highly Recommended: For customers seeking maximum horsepower and performance, Katech offers an optional E85 flex fuel package. E85's knock resistance and charge-cooling benefits can support increased performance potential when combined with the appropriate fuel system and calibration. Contact Katech Sales for additional information and pricing.

Additional performance upgrades may also be available, including exhaust improvements, cooling system enhancements, drivetrain modifications, and other supporting components. Contact a Katech Performance Specialist to discuss the appropriate upgrades for your vehicle and performance goals.

Optional upgrades are not included in the standard Stage 4 package unless specifically listed.

Frequently Asked Questions

Important Information

Advertised 950HP output represents engine horsepower for the specified package configuration, not rear-wheel horsepower. Actual results may vary based on vehicle condition, fuel quality, fuel delivery capacity, environmental conditions, and other factors.

The Stage 4 package includes the Kong LS9 2650 supercharger, Kong supercharger lid, Katech 112mm throttle body, Kong carbon fiber air intake, upgraded supercharger drive components, DSX auxiliary fuel pump, FIC 850cc fuel injectors, Katech LS9 camshaft, CNC-ported cylinder heads, upgraded valvetrain, and professional calibration.

Fuel System Considerations: Fuel system capacity must be appropriate for the vehicle's intended horsepower and fuel type. Katech should verify the suitability of the included FIC 850cc injectors and DSX auxiliary fuel pump for the completed configuration. Additional fuel system upgrades may be necessary, particularly for E85 operation.

E85 Flex Fuel Upgrade: An optional E85 flex fuel package is available and highly recommended for customers seeking maximum performance. This upgrade is not included in the standard Stage 4 package. Contact Katech Sales for additional information, pricing, and compatibility. Actual performance gains depend on fuel composition, vehicle configuration, fuel system capacity, and calibration.

Vehicles with existing mechanical concerns or aftermarket modifications may require additional evaluation or repairs. Additional components and services are not included unless specifically listed.

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

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

Contact Katech Engineering for current pricing, scheduling availability, compatibility, and available additional upgrades.

Ready to Upgrade Your C6 ZR1 Corvette?

Contact Katech Engineering to discuss your performance goals and schedule your C6 ZR1 Corvette Stage 4 950HP Installed Performance Package.

Interested in maximizing horsepower with E85? Ask our team about the highly recommended optional E85 flex fuel package, available separately.

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