Katech Stage 2 C6 Z06 Corvette 675HP Installed Performance Package

Katech C6 Z06 Corvette Stage 2 675HP Installed Performance Package

675 HP Naturally Aspirated LS7 Performance with Katech Cylinder Head Fix, CNC-Ported Heads, LS7 All-Day Camshaft, MSD Atomic Intake, and Spintron-Validated Valvetrain!

675 HP Naturally Aspirated Performance for the Legendary 7.0L LS7

The Katech C6 Z06 Corvette Stage 2 675HP Installed Performance Package is a comprehensive naturally aspirated performance upgrade designed for the Chevrolet Corvette Z06 equipped with the GM LS7 7.0L V8. Combining precision cylinder head machining, upgraded valve components, a performance camshaft, high-flow induction components, and professional dyno calibration, this package transforms the LS7 into a more powerful and responsive performance engine.

At the heart of Stage 2 is Katech's LS7 cylinder head fix, which includes Katech TiMo intake valves and CHE bronze valve guides. These components are paired with Katech CNC-ported cylinder head runners, a competition valve job, valve job hand blending, cylinder head decking, and cylinder head detail service to improve airflow and address important areas of the LS7 cylinder head valve system.

The Katech LS7 All-Day camshaft is supported by a Katech Spintron-validated valvetrain featuring PSI 1511 valve springs, Katech tool steel retainers, steel spring locators, valve seals, Johnson 2110-K lifters with Katech-specified lifter bore clearance, and Trend 3/8-inch, .080-wall pushrods. A Katech C5R timing chain, billet tensioner, and ARP cam bolts complete the upgraded timing configuration.

To complement the cylinder head and camshaft modifications, Stage 2 includes a Halltech MF103 Black Killer Bee cold air intake, Katech black-anodized billet 103mm throttle body, and MSD Atomic intake manifold with red lettering. Together, these components provide an upgraded induction path to support the LS7's increased airflow requirements.

An ATI damper with stock drive diameter, 160-degree thermostat, NGK TR6 V-Power spark plugs, and the specified engine gaskets, seals, fluids, and hardware are also included. Professional installation, baseline dyno testing, HP Tuners calibration, chassis dyno tuning, and street drivability calibration complete the package.

2006–2008 Model-Year Notice: Exhaust valve replacement is required at an additional cost under Katech's stated LS7 valve-fix policy for the Stage 1 package. Owners of 2006–2008 vehicles should confirm the same requirement and additional pricing for this Stage 2 package with Katech Sales before scheduling.

Specifications

Performance Highlights

• 675 HP Naturally Aspirated LS7 Performance
• Katech LS7 Cylinder Head Fix
• Katech TiMo Intake Valves and CHE Bronze Valve Guides
• Katech CNC-Ported LS7 Cylinder Head Runners
• Katech Competition Valve Job and Hand Blending
• Cylinder Head Decking and Detail Service
• Katech LS7 All-Day Camshaft
• Katech Spintron-Validated Valvetrain
• PSI 1511 Valve Springs
• Katech Tool Steel Retainers and Steel Locators
• Katech Valve Seals
• Johnson 2110-K Lifters with Katech-Specified Lifter Bore Clearance
• Trend 3/8-Inch, .080-Wall Pushrods
• Halltech MF103 Black Killer Bee Intake
• Katech Black-Anodized Billet 103mm Throttle Body
• MSD Atomic Intake Manifold with Red Lettering
• Katech C5R Timing Chain
• Katech Black-Anodized Billet Tensioner
• ATI Damper with Stock Drive Diameter
• 160-Degree Thermostat
• Professional Installation and Engine Reassembly
• Baseline Chassis Dyno Testing
• HP Tuners Credits
• Chassis Dyno Tuning and Street Calibration
• Katech Serialized Stage 2 Plaque
• 1-Year / 12,000-Mile Katech Limited Warranty

Is This Package Right for You?

The Katech Stage 2 675HP package is designed for C6 Z06 owners seeking significant naturally aspirated performance gains while retaining the LS7 engine's original displacement and naturally aspirated configuration.

Unlike a basic intake and calibration package, Stage 2 addresses multiple aspects of engine performance. CNC-ported cylinder head runners, a competition valve job, and the LS7 All-Day camshaft support improved engine breathing. The MSD Atomic intake manifold and 103mm throttle body complement those changes, while the Spintron-validated valvetrain and upgraded timing components support the more demanding camshaft configuration.

The included LS7 head fix also makes Stage 2 appealing to owners who want to combine performance modifications with valve guide and intake valve upgrades during the same cylinder head service.

• 675 HP Naturally Aspirated Performance
• Extensive LS7 Cylinder Head Preparation
• Upgraded Intake Valves and Bronze Valve Guides
• Increased Cylinder Head and Induction Airflow
• More Aggressive Camshaft Sound and Character
• Improved High-RPM Breathing
• Matched Performance Valvetrain Components
• Upgraded Timing System and Damper
• Professional Installation, Dyno Tuning and Street Calibration

What's Included

Airflow and Induction System

• Halltech MF103 Black Killer Bee Cold Air Intake
• Katech 103mm Billet Throttle Body, Black Anodized
• MSD Atomic Intake Manifold, Red Lettering

LS7 Cylinder Head Fix and Machining

• Katech LS7 Head Fix
• Katech TiMo Intake Valves
• CHE Bronze Valve Guides
• Katech Competition Valve Job
• Katech Valve Job Hand Blending
• Katech CNC Porting of Cylinder Head Runners
• Cylinder Head Deck Machining
• Cylinder Head Detail Service
• GM LS7 Head Gaskets
• ARP Head Bolts

Camshaft and Spintron-Validated Valvetrain

• Katech LS7 All-Day Camshaft
• Katech Spintron-Validated Valvetrain Configuration
• PSI 1511 Valve Springs
• Katech Tool Steel Retainers
• Katech Steel Spring Locators
• Katech Valve Seals
• Johnson 2110-K Lifters with Katech-Specified Lifter Bore Clearance
• GM Lifter Trays
• Trend 3/8-Inch, .080-Wall Pushrods

Timing System and Damper

• Katech C5R Timing Chain
• Katech Billet Tensioner, Black Anodized
• ARP Cam Bolts
• ATI Damper, Stock Drive Diameter
• GM LS7 Damper Bolt

Cooling System

• 160-Degree Thermostat
• GM Dex-Cool Coolant

Ignition, Gaskets and Seals

• NGK TR6 V-Power Spark Plugs
• 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

Installation, Calibration and Validation

• Professional Installation Labor
• Shop Supplies
• Baseline Dyno Testing
• HP Tuners Credits
• Street Calibration Service
• Chassis Dyno Tuning

Finishing Details and Warranty

• Katech Serialized Stage 2 Plaque
• Katech 1-Year / 12,000-Mile Limited Warranty – See Terms for Details

The Katech Installation Process

Vehicle Evaluation 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 2 combination.

LS7 Cylinder Head Fix

The LS7 cylinder heads receive Katech's head fix service, including Katech TiMo intake valves and CHE bronze valve guides. This work addresses specified areas of the LS7 valve system and forms part of the comprehensive cylinder head preparation included with Stage 2.

Cylinder Head CNC Porting and Valve Job

Katech CNC-ports the LS7 cylinder head runners to improve airflow. A competition valve job and hand blending are performed to complement the porting work. Cylinder head decking and detail service are also included before reassembly using GM LS7 head gaskets and ARP head bolts.

Katech LS7 All-Day Camshaft Installation

The factory LS7 camshaft is replaced with the Katech LS7 All-Day camshaft. This performance camshaft is paired with the upgraded cylinder heads and induction components to support increased naturally aspirated horsepower and torque.

Spintron-Validated Valvetrain Installation

The package includes a Katech Spintron-validated valvetrain configuration with PSI 1511 valve springs, Katech tool steel retainers, steel spring locators, and valve seals. Johnson 2110-K lifters with Katech-specified lifter bore clearance, GM lifter trays, and Trend pushrods complete the listed valvetrain components.

Timing System and Damper Upgrades

A Katech C5R timing chain, black-anodized billet tensioner, and ARP cam bolts are installed as part of the upgraded timing system. The package also includes an ATI damper with stock drive diameter and a GM LS7 damper bolt.

Induction System Installation

The Halltech MF103 Black Killer Bee cold air intake, Katech billet 103mm throttle body, and MSD Atomic intake manifold are installed to improve the LS7's induction airflow. These components complement the increased airflow capacity of the CNC-ported cylinder heads and performance camshaft.

Cooling System and Engine Service

A 160-degree thermostat is installed, with GM Dex-Cool coolant included for the associated cooling system service. The package also includes NGK TR6 V-Power spark plugs, Mobil 1 5W-30 oil, a GM UPF48 oil filter, and the specified gaskets and seals used during engine reassembly.

Wideband Tuning Preparation

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

HP Tuners and Chassis Dyno Calibration

Using HP Tuners software and included credits, Katech calibrates the LS7 engine management system for the upgraded camshaft, CNC-ported cylinder heads, 103mm throttle body, and MSD Atomic intake manifold. Chassis dyno tuning is used to evaluate performance and refine the completed calibration.

Street Drivability Calibration

Following chassis dyno tuning, the vehicle receives street calibration to refine idle quality, throttle response, part-throttle operation, and general driving characteristics. The objective is to deliver the intended performance while maintaining predictable operation for the vehicle's intended use.

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 2 675HP package combines Katech's LS7 cylinder head service, CNC machining, Spintron-validated valvetrain development, professional installation, and calibration capabilities in a complete naturally aspirated performance package.

Rather than relying on a single modification, the package addresses induction airflow, cylinder head performance, camshaft operation, valvetrain components, timing hardware, and calibration as a coordinated combination.

2006–2008 C6 Z06 Exhaust Valve Considerations

Katech's Stage 1 LS7 valve-fix package specifies mandatory exhaust valve replacement for 2006–2008 C6 Z06 vehicles at an additional cost. Because the Stage 2 package also includes the Katech LS7 head fix, owners of 2006–2008 vehicles should confirm the applicable exhaust valve replacement requirements and pricing for Stage 2 before scheduling installation.

Exhaust valve replacement is not separately listed in the standard Stage 2 package components. Contact Katech Sales to confirm vehicle-specific requirements and any additional charges.

Frequently Asked Questions

Important Information

Advertised 675HP 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 package includes the Katech LS7 head fix, Katech TiMo intake valves, and CHE bronze valve guides. Exhaust valve replacement is not separately listed in the supplied package contents. Owners of 2006–2008 vehicles should confirm any additional exhaust valve replacement requirements and charges with Katech Engineering.

Vehicles with existing cylinder head damage, mechanical concerns, or aftermarket modifications may require additional evaluation or repairs. Additional work is not included unless specifically identified in the package or approved separately.

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 1-year / 12,000-mile Katech 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 Z06 Corvette?

Contact Katech Engineering to discuss your performance goals and schedule your C6 Z06 Corvette Stage 2 675HP Installed Performance Package.

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