Developed through Katech’s involvement in professional endurance racing, the Katech HRS Block C5-R Timing Chain has demonstrated exceptional durability. Across documented C5-R racing programs and internal durability testing, no timing chain failures have been recorded, reinforcing its suitability for the most demanding LS-based racing applications.
This timing chain design is derived from and utilized in Corvette Racing C5-R–based programs, with applications spanning the C5-R, C6.R, and C7.R eras, and has been proven in top-level endurance competition such as the 24 Hours of Le Mans and 24 Hours of Daytona.
The Katech C5-R race chain is an easy replacement, production-style timing chain that utilizes production sprockets (not included). Unlike typical double-roller race chains, this design does not require oil pump clearancing when used with a production-style oil pump.
Compared to standard aftermarket IWIS LS timing chains, the Katech C5-R chain incorporates proprietary enhancements, including fine-blanked chain plates and a Katech-specified proprietary pin coating, improving fatigue resistance, wear characteristics, and long-term timing stability under sustained high-RPM operation.
Each genuine Katech RHS Block C5-R Timing Chain is laser-engraved with the Katech logo for positive identification. This marking confirms the component as a Katech-exclusive offering, developed from Katech’s C5-R racing experience and supplied by Katech Engineering directly and through authorized distribution channels.
Designed for RHS LS-Based Blocks
Engineered specifically to match RHS block timing geometry requiring C5-R–style chain length and engagement
High-Strength Chain Construction
Built to withstand high RPM, aggressive cam profiles, and elevated valve-spring loads
Precision Camshaft Timing Control
Maintains accurate cam timing under load, minimizing stretch and timing deviation
Race-Validated Design
Derived from Katech’s professional motorsports and endurance racing experience
Ideal for Competition & High-Performance Builds
Suitable for road race, endurance, track-day, and high-output LS applications
This timing chain is optimized for RHS LS-based engine blocks that utilize C5-R–style timing architecture, ensuring correct engagement with the crank and cam sprockets while maintaining proper tension and alignment. The design prioritizes strength, fatigue resistance, and dimensional stability to support demanding race environments and extended high-RPM operation.
NOTE | Proper installation, sprocket compatibility, and timing verification are critical. Professional engine assembly is strongly recommended.
RHS LS-based engine blocks requiring C5-R timing chain configuration
Professional and amateur road racing & endurance engines
High-RPM naturally aspirated, or forced-induction LS builds
Custom race engines where timing accuracy and durability are critical
Important Fitment Note
NOTE | This is the 62-link timing chain intended for RHS and Dart LS-based blocks, as well as Katech tall deck blocks with a raised camshaft position. It is not intended for standard production LS block timing geometry.
Since 1977, Katech has been trusted by racers, OEM programs, and performance enthusiasts for engineering-driven solutions that perform under real-world race conditions. Every component reflects our commitment to precision machining, rigorous validation, and race-winning reliability.
Designed by Katech Engineering in Clinton Township, Michigan, this timing chain represents decades of motorsports experience applied to modern high-performance engine builds.
