HKS 11999-AT002 Extension Kit with Catalytic Converter for Turbo Kit

The HKS Extension Kit with Catalytic Converter is designed specifically for use with the HKS GT III-RS86 Bolt-On Turbo Kit. This performance exhaust component optimizes exhaust flow by utilizing a unique dual-port design that separates turbine exhaust from wastegate actuator flow, minimizing exhaust gas interference for smoother operation.

Key Features:

• Dedicated main port for turbine exhaust and bypass port for wastegate actuator reduces backpressure
• Divider in exhaust flange eliminates turbulence and exhaust gas interference
• Enlarged diameter main pipe at turbine outlet decreases swirl flow
• Stabilizes boost pressure across entire RPM range for improved engine output
• Stainless steel construction for durability and heat resistance
• Includes three types of heat shield plates for comprehensive protection

Kit Includes:

• Extension pipe with integrated catalytic converter
• Heat shield plates (3 types)
• Gaskets, bolts, nuts, and hardware

This extension kit enhances throttle response and overall engine performance while maintaining a more emissions-compliant setup compared to straight pipe alternatives. Designed for precise fitment and easy installation when used with the compatible HKS turbo system.