Katech RHS Block C5.R Timing Chain

Katech RHS Block C5.R Timing Chain

Developed through Katech’s involvement in professional endurance racing, the Katech RHS 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 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 and C6.R eras. It has been proven in top-level endurance competition, including 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.

Key Features & Benefits

• Designed for RHS LS-Based Blocks
  Engineered specifically to match RHS block raised camshaft timing geometry.
• 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.

Technical Overview

This timing chain is optimized for RHS LS-based raised camshaft engine blocks, 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. 

Engine & Block Fitment

Compatible Engine Blocks

• RHS LS-Based Engine Blocks with .388 raised camshaft position 
• Dart LS-Based Engine Blocks with .388 raised camshaft position 

Engine Applications

• High-Performance LS-Based Racing Engines
• Road Racing and Endurance Racing Engines
• Naturally Aspirated and Forced-Induction Competition Engines

Important Fitment Notes

• This is a 62-link timing chain designed for RHS and Dart LS-based engine blocks with a raised camshaft position.
• Not compatible with standard production LS engine block timing geometry.
• Designed for use with compatible production-style crankshaft and camshaft timing sprockets (not included).
• Does not require oil pump clearancing when used with a compatible production-style oil pump.
• Verify engine block configuration, timing sprocket compatibility, and timing system geometry before ordering.

Why Choose Katech?

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.