Kooks 3" SS Catted ULTRA X Pipe. 2014-2019 Corvette C7. Connects to OEM. — 21703220

3" Stainless Catted ULTRA X-Pipe

Unleash the full potential of your 2014–2019 Corvette C7 with a Kooks 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 high-flow 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

• 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-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 / LT5)

• Requires Kooks Long Tube Headers

• Connects to 2-3/4" OEM exhaust systems

• Note: Standard catalytic converters are not rated for forced-induction applications

• Standard Cats support up to 550 RWHP

Part number: 21703220

Vehicle application

2014-2019 Chevrolet Corvette Stingray 6.2L V8, 2014-2016 Chevrolet Corvette Z51 6.2L V8, 2015-2019 Chevrolet Corvette Z06 6.2L V8, 2017-2019 Chevrolet Corvette Grand Sport 6.2L V8, 2019-2019 Chevrolet Corvette ZR1 6.2L V8

Emissions requirements vary by application. Verify the manufacturer’s product-specific requirements before ordering.

WARNING: This product can expose you to chemicals including Chromium and Nickel, which are known to the State of California to cause cancer, birth defects or reproductive harm. For more information go to www.p65warnings.ca.gov

Professional installation available at League Motorsports — Los Angeles.

Financing available — Apply here.

Not sure what your fitment is? Contact us by phone at 213-372-5955, DM us on Instagram, or email info@leaguemotorsports.com.