3″ Stainless Competition-Only ULTRA X-Pipe
Unleash the full potential of your 2006–2013 Corvette C6 Z06 or ZR1 with a Kooks Competition-Only ULTRA X-Pipe engineered exclusively for LS7 and LS9 performance, part number 21613121. Designed to integrate with 3″ OEM-style exhaust systems, this upgraded ULTRA X configuration uses a full-length Long Merge to improve scavenging, enhance top-end power, and deliver the unmistakable X/H-inspired tone Corvette enthusiasts love.
Crafted from premium 3″ stainless steel and built for maximum flow, this system pairs only with Kooks Long Tube Headers. When combined, they create a free-breathing, track-proven exhaust path that sharpens throttle response and amplifies the raw character of your naturally aspirated or supercharged V8. Expect a crisp, exotic edge on acceleration with the deeper mid-range resonance associated with blended X/H systems.
Features & Benefits
- Competition-only ULTRA X design for maximum performance
- Full-length Long Merge for enhanced exhaust pulse scavenging
- Includes front connections to interface directly with Kooks Long Tube Headers
- Mandrel-bent 3″ stainless steel tubing for optimized flow and long-term durability
- CNC-built construction ensures precision fitment and consistent quality
- Connects directly to 3″ OEM (Z06/ZR1-style) rear exhaust systems
Fitment Notes
- Designed for 2006–2013 Corvette C6 Z06/ZR1 (LS7/LS9)
- Requires Kooks Long Tube Headers (does not fit the oem exhaust manifolds)
- Connects to 3″ OEM (Z06/ZR1-Style) exhaust systems
- Competition-only use, not legal for street use
