The CHRA-GT42RS is a genuine Garrett center housing and rotating assembly built for enthusiasts and professional engine builders who demand serious high-boost performance without compromise. Designed around ball bearing construction, this core delivers the rapid response and durability required for aggressive turbocharged builds. It’s the right choice for anyone building a high-horsepower platform who needs a proven, authentic Garrett core at the heart of their turbo system.

Specifications

• Turbine Housing A/R Ratio: .61
• Bearing Type: Ball Bearing
• Garrett P/N: 451888-5011S
• Also Known As: GT4202R/RS

Performance & Application

This CHRA is engineered for high-boost applications that demand quick turbo response combined with long-term reliability. The ball bearing design reduces spool-up time compared to traditional journal bearing units, making it well suited for builds where responsiveness under load is critical. It serves as the foundation for high-performance turbo systems where consistent, dependable power delivery is non-negotiable.

Frequently Asked Questions

Is the CHRA-GT42RS a ball bearing or journal bearing unit?

The CHRA-GT42RS uses ball bearing construction, which reduces spool-up time for quicker turbo response.

What is the A/R ratio of the turbine housing?

This CHRA is built with a .61 A/R turbine housing.

What does GT4202R/RS refer to?

GT4202R/RS is an alternate name for the Garrett CHRA-GT42RS.

What is this CHRA designed for?

It’s engineered for high-boost applications that demand quick response and reliability.

For builds that require authentic Garrett ball bearing performance and dependable high-boost operation, the CHRA-GT42RS stands as a proven, purpose-built core.