High-Flow Catalytic Converters Milltek Chevrolet Corvette C8 - HJS HQ Catalysts - Without Heat Shield/WITH Heat Shield

Milltek Sport Hi-Flow high-flow catalytic converter for Chevrolet Corvette C8 / Corvette C8 Z06

This Milltek Sport Hi-Flow catalytic converter for Chevrolet Corvette C8 / Corvette C8 Z06 replaces the factory catalytic converter with a high-flow unit, improving exhaust gas flow while maintaining emissions control.

Technical specifications

• Milltek part number: SSXCH111
• Part type: Hi-Flow sport catalytic converter
• Detail: HJS HQ 200CPSI catalysts
• Tube diameter: 76.2 mm (3 inch)
• Installation information: Without heat shield | WITH heat shield
• Material: aerospace-grade stainless steel
• Manufacturer: Milltek Sport (UK)

Compatible vehicles

• Chevrolet Corvette C8 Stingray and E-Ray 6.2L V8 495-654 hp (hybrid compatible, 2020-2025, no DPF)
• Chevrolet Corvette C8 Z06 5.5 V8 679 hp (2023-2025, no DPF)

Not sure about fitment for your vehicle? Contact us with your VIN before ordering.

Frequently asked questions

• Is an ECU tune required? Yes. A suitable ECU map (Stage 2) is essential to get the full gain and avoid a check engine light related to the lambda sensors. It is the question buyers ask most, and the answer is always the same.

Why choose Milltek Sport?

Milltek Sport designs and manufactures its exhausts in England, using mandrel-bent tubing to preserve the inside diameter and a fit developed on the vehicle. The result: a clean installation with no modifications, and a sound tuned to stay pleasant for everyday driving.

Further reading

• Downpipe: decat or high-flow catalytic converter for your Stage 2?