3″ Stainless High Output GREEN Catted ULTRA X-Pipe.

Unleash the full potential of your 2014–2019 Corvette C7 with a Kooks H.O. GREEN Catted ULTRA X-Pipe engineered exclusively for LT1 and LT4 performance. Designed to integrate with the factory 2-3/4″ OEM-style exhaust system, this upgraded ULTRA X configuration uses a full-length Long Merge to improve scavenging, enhance overall exhaust efficiency, and deliver the unmistakable X/H-inspired tone Corvette enthusiasts love.

Equipped with H.O. GREEN catalytic converters, this system refines exhaust character while preserving the aggressive personality expected from a ULTRA X layout. Expect a crisp, exotic edge under acceleration complemented by a deeper, more composed mid-range resonance, providing a balanced, performance-driven sound that stands out without overwhelming rasp.

Crafted from premium 3″ stainless steel and built for high-performance applications, this system pairs only with Kooks Long Tube Headers. Together, they create a smooth, unrestricted exhaust path that sharpens throttle response and elevates the driving experience of your LT-powered Corvette.

Features & Benefits

H.O. GREEN Catted ULTRA X design for improved performance and refined exhaust tone
Full-length Long Merge for enhanced exhaust pulse scavenging
Includes front connections to interface directly with Kooks Long Tube Headers
High Output high-flow catalytic converters for smoother, more controlled sound output
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 2-3/4″ OEM-style rear exhaust systems

Fitment Notes

Designed for 2014–2019 Corvette C7 (LT1 / LT4)
Requires Kooks Long Tube Headers
Connects to 2-3/4″ OEM exhaust systems
H.O. GREEN Cats support 1,000+ RWHP

21703420

Kooks 3 Inch ULTRA HO GREEN Catted X-Pipe For 2014-19 C7 Corvette Stingray Grand Sport Z06 ZR1 21703420