Katech C6 ZR1 Corvette Stage 3 850HP Installed Performance Package

Katech C6 ZR1 Corvette Stage 3 850HP Installed Performance Package

850 HP Supercharged LS9 Performance with Katech-Ported Supercharger, CNC-Ported Cylinder Heads, LS9 Camshaft, Upgraded Valvetrain, and Professional Dyno Tuning!

Take Your Supercharged LS9 to 850 Horsepower

The Katech C6 ZR1 Corvette Stage 3 850HP Installed Performance Package is designed for enthusiasts seeking a significant increase in performance from Chevrolet's legendary supercharged 6.2L LS9 V8. Combining Katech LS9 supercharger and snout porting, CNC-ported cylinder heads, a performance camshaft, upgraded valvetrain components, and a comprehensive supercharger drive system, Stage 3 is engineered to deliver an impressive 850 engine horsepower.

Building on the performance potential of the factory LS9 supercharger, Stage 3 focuses on improving airflow throughout the engine while retaining the original supercharger assembly. Katech LS9 supercharger porting and supercharger snout porting help reduce induction restrictions and support the increased airflow demands of the upgraded combination.

A Katech CNC-ported LS9 throttle body and AttackBlue high-flow air filter complement the ported supercharger, providing an improved induction path. The combination of these modifications allows the factory supercharger to operate as part of a more comprehensive performance system.

Supercharger drive upgrades include a GripTec 2.6-inch supercharger pulley, Gates HD supercharger belt, ATI LS9 damper, and ATI LS9 lower pulley. These components support increased supercharger drive speed and the higher performance demands of the Stage 3 package. GripTec's specialized pulley surface is designed to improve belt traction and help minimize unwanted belt slip under load.

Beyond the supercharger modifications, Stage 3 includes Katech CNC-ported cylinder heads, a Katech LS9 camshaft, competition and hand-blend valve jobs, and an upgraded valvetrain. These modifications improve the engine's ability to move air and support increased horsepower at higher operating demands.

The valvetrain 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. FIC 850cc fuel injectors provide additional fuel delivery capacity, while NGK BR7EF spark plugs are included for the upgraded supercharged engine configuration.

Highly Recommended E85 Flex Fuel Upgrade: For customers looking to maximize the performance potential of their Stage 3 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 3 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 3 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

• 850 HP Supercharged LS9 Performance
• Designed for Chevrolet C6 Corvette ZR1 Models
• Katech LS9 Supercharger Porting
• Katech LS9 Supercharger Snout Porting
• Katech CNC-Ported LS9 Throttle Body
• GripTec 2.6-Inch Supercharger Pulley
• ATI LS9 Damper and Lower Pulley
• Gates HD Supercharger Belt
• AttackBlue High-Flow Air Filter
• 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 3 850HP package is designed for owners who want to extract substantially more performance from the factory LS9 supercharger while upgrading the engine's cylinder heads, camshaft, and valvetrain to support the additional horsepower.

Unlike packages focused primarily on supercharger pulley and induction modifications, Stage 3 addresses airflow throughout the entire engine. Katech supercharger and snout porting improve the induction path, while CNC-ported cylinder heads and a performance camshaft support increased airflow through the engine.

The upgraded valvetrain and head stud fastening system complement the increased performance demands of the package, while FIC 850cc injectors provide additional fuel delivery capacity compared with the factory configuration.

For customers looking to maximize the combination's performance potential, Katech highly recommends discussing the optional E85 flex fuel package. With an appropriately configured fuel system and calibration, E85 can provide increased knock resistance and additional horsepower potential.

Stage 3 is an excellent choice for enthusiasts seeking aggressive supercharged performance while retaining the factory LS9 supercharger architecture.

• 850 HP Supercharged Performance
• Factory LS9 Supercharger Retained and Ported
• Improved Supercharger and Cylinder Head Airflow
• Upgraded Supercharger Drive System
• Katech LS9 Performance Camshaft
• Upgraded Valvetrain Components
• Kong LS9 Head Stud Fastening System
• FIC 850cc Fuel Injectors
• Optional E85 Flex Fuel Upgrade for Maximum Performance Potential
• Professional Installation and Dyno Calibration
• Street Drivability Calibration

What's Included

Supercharger and Induction Upgrades

• Katech LS9 Supercharger Porting
• Katech LS9 Supercharger Snout Porting
• Katech CNC-Ported LS9 Throttle Body
• AttackBlue High-Flow Air Filter

Supercharger Drive System

• GripTec 2.6-Inch Supercharger Pulley
• Gates HD Supercharger Belt
• ATI LS9 Damper
• ATI LS9 Lower Pulley

Fuel System Upgrades

• 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 3 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 3 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 3 850HP 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 upgrades may be necessary depending on the vehicle's configuration and performance goals. 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 3 850HP 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 3 package.

Katech LS9 Supercharger Porting

The factory LS9 supercharger receives Katech's porting service to improve airflow through the supercharger assembly. This precision machining is designed to reduce airflow restrictions and support the increased demands of the Stage 3 performance configuration.

Katech LS9 Supercharger Snout Porting

The LS9 supercharger snout is ported to improve the airflow path entering the supercharger. This modification complements the supercharger porting and CNC-ported throttle body, creating a more efficient induction path.

Katech CNC-Ported LS9 Throttle Body

The factory LS9 throttle body receives Katech CNC porting to improve airflow through the throttle body opening. The modified throttle body works with the ported supercharger snout and supercharger assembly to support the Stage 3 combination.

GripTec 2.6-Inch Supercharger Pulley Installation

A GripTec 2.6-inch supercharger pulley is installed to increase supercharger drive speed compared with the factory configuration. The GripTec pulley features a specialized traction surface designed to improve belt grip and help reduce unwanted belt slip under load.

ATI Damper and Lower Pulley Installation

The package includes an ATI LS9 damper and ATI LS9 lower pulley. These components are installed as part of the upgraded supercharger drive configuration, supporting the pulley combination used for the Stage 3 performance target.

Gates HD Supercharger Belt Installation

A Gates HD supercharger belt is installed to support the upgraded drive system. The heavy-duty belt works with the GripTec pulley and ATI lower pulley configuration to transfer engine power to the supercharger.

AttackBlue High-Flow Air Filter Installation

The AttackBlue high-flow air filter is installed to support improved induction airflow into the supercharger. The filter complements the ported throttle body, snout, and supercharger assembly.

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 to support the Stage 3 combination.

Katech CNC Cylinder Head Porting

The LS9 cylinder heads receive Katech CNC porting to improve airflow and support the increased demands of the upgraded 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 3 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 3 configuration.

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 ported supercharger, upgraded supercharger drive system, FIC 850cc injectors, Katech LS9 camshaft, CNC-ported cylinder heads, and other Stage 3 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.

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 3 850HP package combines Katech's supercharger and cylinder head machining capabilities, performance camshaft selection, carefully chosen supercharger drive components, professional installation, and calibration to deliver a comprehensive LS9 performance solution.

Rather than relying on increased supercharger drive speed alone, Stage 3 addresses airflow throughout the engine, 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 3 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, and drivetrain modifications. 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 3 package unless specifically listed.

Frequently Asked Questions

Important Information

Advertised 850HP output represents engine horsepower for the specified package configuration, not rear-wheel horsepower. Actual results may vary based on vehicle condition, fuel quality, environmental conditions, and other factors.

The Stage 3 package retains the factory LS9 supercharger, which receives Katech supercharger and snout porting. The package includes a GripTec 2.6-inch supercharger pulley, Katech CNC-ported throttle body, AttackBlue high-flow air filter, Gates HD supercharger belt, ATI LS9 damper and lower pulley, FIC 850cc injectors, Katech LS9 camshaft, CNC-ported cylinder heads, upgraded valvetrain, and professional calibration.

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 3 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 3 850HP 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