Katech C6 LS3 525HP K-Spec Heads/Cam Installed Performance Package
Price: $8699.99
Description
Katech C6 Corvette LS3 K-Spec 525HP Heads & Cam Installed Performance Package
525 HP Naturally Aspirated LS3 Performance with Katech CNC-Ported Cylinder Heads, LS3 Torquer Camshaft, BTR Dual Valve Springs, and Professional Dyno Tuning!
Katech Heads and Cam Performance for the GM LS3
The Katech C6 LS3 525HP K-Spec Heads/Cam Installed Performance Package is designed for Corvette owners seeking a substantial naturally aspirated performance upgrade through proven cylinder head and camshaft modifications. Developed for the GM LS3 6.2L V8, this package combines Katech CNC-ported cylinder head runners, the Katech LS3 Torquer camshaft, upgraded valve springs, GM LS7 lifters, and professional engine calibration to deliver a 525HP performance combination.
At the center of the package is the Katech LS3 Torquer camshaft, designed to enhance the LS3's naturally aspirated performance characteristics. Paired with Katech CNC-ported cylinder head runners, the camshaft helps improve engine breathing and supports increased horsepower and torque compared with the factory configuration.
To support the upgraded camshaft, the package includes a BTR .660-inch dual valve spring kit, GM LS7 lifter set, GM lifter trays, Trend 3/8-inch, .080-wall pushrods, and ARP cam bolts. GM LS3 head gaskets and ARP head bolts are included for cylinder head installation, along with the specified gaskets, seals, fluids, and service components needed for the listed work.
A 160-degree thermostat is included as part of the cooling system modifications. Following installation, Katech performs baseline dyno testing, chassis dyno tuning, and street drivability calibration using HP Tuners to refine the engine's performance and operating characteristics.
The K-Spec package is an excellent option for enthusiasts who want the performance and sound of a heads-and-cam LS3 without the additional induction and valvetrain components included in Katech's more extensive Stage 2 550HP package.
Specifications
| Vehicle Platform | Chevrolet Corvette C6 Equipped with the LS3 Engine |
| Engine Platform | GM LS3 6.2L Naturally Aspirated V8 |
| Engine Configuration | Naturally Aspirated |
| Package Output | 525 HP |
| Package Type | K-Spec Heads and Cam Performance Package |
| Camshaft | Katech LS3 Torquer Camshaft |
| Cylinder Heads | Factory LS3 Cylinder Heads with Katech CNC-Ported Runners |
| Valve Springs | BTR .660-Inch Dual Valve Spring Kit |
| Lifters | GM LS7 Lifter Set |
| Pushrods | Trend 3/8-Inch, .080-Wall |
| Cylinder Head Fasteners | ARP Head Bolts |
| Thermostat | 160-Degree Thermostat |
| ECU Calibration | HP Tuners Calibration |
| Baseline Dyno Testing | Included |
| Chassis Dyno Tuning | Included |
| Street Calibration | Included |
| Installation | Included |
Performance Highlights
- 525 HP Naturally Aspirated LS3 Performance
- Designed for C6 Corvettes Equipped with the 6.2L LS3 V8
- Katech LS3 Torquer Camshaft
- Katech CNC-Ported LS3 Cylinder Head Runners
- BTR .660-Inch Dual Valve Spring Kit
- GM LS7 Lifter Set
- GM Lifter Trays
- Trend 3/8-Inch, .080-Wall Pushrods
- ARP Cam Bolts
- GM LS3 Head Gaskets and ARP Head Bolts
- 160-Degree Thermostat
- GM LS3 Damper Bolt
- Complete Listed Gasket and Seal Components
- Mobil 1 5W-30 Engine Oil and GM UPF48 Oil Filter
- Professional Installation Labor Included
- Baseline Chassis Dyno Testing
- HP Tuners Credits Included
- Professional Chassis Dyno Tuning
- Street Drivability Calibration
- Improved Naturally Aspirated Engine Breathing
- More Aggressive Camshaft Sound and Character
Is This Package Right for You?
The Katech K-Spec 525HP Heads/Cam Package is designed for C6 LS3 Corvette owners who want a meaningful naturally aspirated horsepower increase without moving to a supercharged configuration. By combining Katech CNC cylinder head runner porting with the LS3 Torquer camshaft, this package targets improved engine breathing, stronger acceleration, and a more aggressive performance character.
This package is particularly appealing to enthusiasts who want a heads-and-cam combination with professional installation and calibration while retaining their existing induction system. It provides a focused alternative to the more comprehensive Stage 2 550HP package.
- 525 HP Naturally Aspirated Performance
- Increased Horsepower and Torque Potential
- Improved Cylinder Head Airflow
- More Aggressive Camshaft Sound
- Enhanced Mid-Range and High-RPM Performance
- Upgraded Valve Springs and Lifters
- Retains the Naturally Aspirated LS3 Architecture
- Professional Installation and Calibration
- Baseline and Post-Installation Dyno Evaluation
- Street Drivability Calibration
What's Included
Camshaft and Valvetrain Upgrades
- Katech LS3 Torquer Camshaft
- BTR .660-Inch Dual Valve Spring Kit
- GM LS7 Lifter Set
- GM Lifter Trays
- Trend 3/8-Inch, .080-Wall Pushrods
- ARP Cam Bolts
Cylinder Head Upgrades and Installation Components
- Katech CNC Porting of LS3 Cylinder Head Runners
- GM LS3 Head Gaskets
- ARP Head Bolts
Cooling System Components
- 160-Degree Thermostat
- GM Dex-Cool Coolant
Engine Hardware, Gaskets and Seals
- GM LS3 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
- Wideband O2 Bung
- O2 Plug
- O2 Washer
Calibration and Dyno Services
- Baseline Dyno Testing
- HP Tuners Credits
- Chassis Dyno Tuning
- Street Calibration Service
Installation and Shop Services
- Professional Installation Labor
- Shop Supplies
The Katech Installation Process
Vehicle Inspection
Before installation begins, the vehicle is evaluated for mechanical concerns and existing modifications that may affect the installation or calibration of the K-Spec package. This helps establish a foundation for the completed heads-and-cam upgrade.
Baseline Dyno Testing
Baseline chassis dyno testing is performed to document the vehicle's incoming performance before modifications. These results provide a reference for evaluating the completed package.
Cylinder Head Runner Porting
The LS3 cylinder heads receive Katech CNC runner porting to improve airflow through the cylinder head passages. This machining complements the LS3 Torquer camshaft and supports increased naturally aspirated performance.
Katech LS3 Torquer Camshaft Installation
The factory camshaft is replaced with the Katech LS3 Torquer camshaft. Designed to enhance LS3 performance, the camshaft works with the CNC-ported cylinder head runners to increase the engine's breathing capability and deliver a more aggressive performance character.
Valve Spring and Lifter Upgrades
A BTR .660-inch dual valve spring kit is installed to support the upgraded camshaft. GM LS7 lifters, GM lifter trays, Trend 3/8-inch, .080-wall pushrods, and ARP cam bolts complete the listed supporting valvetrain components.
Cylinder Head Reinstallation
Following cylinder head porting and valvetrain preparation, the cylinder heads are reinstalled using GM LS3 head gaskets and ARP head bolts. The package also includes the specified engine gaskets, seals, and hardware associated with the installation.
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 Service
The engine is reassembled using the listed 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 LS3 engine management system to account for the LS3 Torquer camshaft and CNC-ported cylinder head runners.
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, idle quality, part-throttle operation, and general drivability. Particular attention is given to the operating characteristics of the upgraded camshaft.
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 K-Spec 525HP Heads/Cam Package combines Katech's cylinder head CNC machining, performance camshaft selection, professional installation, and calibration capabilities to deliver a focused naturally aspirated LS3 performance solution.
Rather than including every possible performance component, the K-Spec package concentrates on the cylinder head and camshaft modifications that form the foundation of a traditional heads-and-cam LS3 build.
Recommended Upgrades
For owners interested in additional horsepower or further improving the LS3's airflow, Katech offers additional performance solutions. Contact a Katech Performance Specialist to discuss available cold air intake upgrades, throttle body modifications, exhaust components, and other LS3 performance options.
Additional components and services are not included unless specifically listed in the package contents.
Frequently Asked Questions
▾ Does this package include installation?
Yes. Professional installation labor is included in the Katech C6 LS3 525HP K-Spec Heads/Cam Package.
▾ How much horsepower does the K-Spec package make?
The K-Spec package is rated at 525 engine horsepower in the specified configuration. Actual results may vary based on vehicle condition, fuel quality, environmental conditions, and other factors.
▾ What Corvettes are compatible with this package?
This package is designed for Chevrolet C6 Corvettes equipped with the factory GM LS3 6.2L V8 engine. Contact Katech Engineering to confirm compatibility with your specific vehicle and existing modifications.
▾ Does this package include cylinder head porting?
Yes. The package includes Katech CNC porting of the LS3 cylinder head runners.
▾ What camshaft is included?
The package includes the Katech LS3 Torquer camshaft, designed to improve naturally aspirated LS3 performance.
▾ What valve springs are included?
The package includes a BTR .660-inch dual valve spring kit to support the upgraded camshaft.
▾ Does this package include upgraded lifters?
Yes. The package includes a GM LS7 lifter set and GM lifter trays.
▾ Does this package include a cold air intake?
No. A cold air intake is not included in the listed K-Spec package components. Contact Katech Engineering to discuss available intake upgrades.
▾ Does this package include a throttle body upgrade?
No. The K-Spec package does not include a throttle body upgrade. Contact Katech Engineering to discuss available throttle body options.
▾ How does the K-Spec 525HP package compare with the Stage 2 550HP package?
The K-Spec 525HP package focuses on the Katech LS3 Torquer camshaft, CNC-ported cylinder head runners, BTR dual valve springs, and GM LS7 lifters. The Stage 2 550HP package adds a Halltech cold air intake, Katech LS7 CNC-ported throttle body, competition valve job, valve job hand blending, Spintron-validated valvetrain, upgraded timing components, ATI damper, and additional supporting components.
▾ Will the engine sound different after installation?
Yes. The Katech LS3 Torquer camshaft produces a more aggressive idle and engine character compared with the factory LS3 camshaft. The exact sound will depend on the vehicle's existing exhaust system and calibration.
▾ Does this package include exhaust headers?
No. Exhaust headers are not included in the listed K-Spec package components. Contact Katech Engineering to discuss available exhaust upgrades.
▾ Is dyno tuning included?
Yes. The package includes baseline dyno testing, HP Tuners credits, chassis dyno tuning, and street calibration service.
▾ Is the advertised horsepower figure measured at the rear wheels?
No. The advertised 525 horsepower figure represents engine horsepower rather than rear-wheel horsepower.
▾ Can I add more performance upgrades?
Yes. Contact Katech Engineering to discuss available induction, exhaust, and other performance upgrades for your LS3 Corvette.
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.
This package is designed for factory LS3-equipped C6 Corvettes. Vehicles with existing engine or aftermarket modifications may require additional evaluation or calibration adjustments.
The K-Spec package includes the listed cylinder head runner porting, camshaft, valve spring kit, lifters, gaskets, hardware, installation, and calibration services. Additional components or machining services are not included unless specifically listed.
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.
Please contact a Katech Performance Specialist for current pricing, scheduling availability, compatibility, and package options.
Ready to Upgrade Your C6 LS3 Corvette?
Contact Katech Engineering to discuss your performance goals and schedule your C6 LS3 Corvette K-Spec 525HP Heads/Cam Installed Performance Package.
Call: (586) 791-4120
Email: sales@katechengines.com
Details
- KAT-C6-3
- KAT-C6-3
- Katech Engineering
- New
Shipping Information
- Item Requires Shipping
Customer Reviews
Total Reviews (0)
You must login to post a review.
Write the First Review!