Kooks 21613221 3 in. SS Catted Ultra X-Pipe OEM Conn 2006-2013 C6 Z06/ZR1

Vehicle Fitment

• 2006-2013 Chevrolet Corvette C6 Z06 (6.2L LS9)
• 2009-2013 Chevrolet Corvette C6 ZR1 (7.0L LS7)

Fitment Notes

• Requires Kooks long tube headers - does not connect to OEM exhaust manifolds
• Connects to OEM-style Z06/ZR1 rear cat-back exhaust at the rear
• Standard catalytic converters included are not rated for forced-induction applications
• Not legal for sale or use in California

Features

• Ultra X-pipe design promotes superior exhaust scavenging for improved top-end power and throttle response
• High-flow catalytic converters reduce emissions without restricting exhaust flow
• 3 in. T304 stainless steel construction delivers long-term corrosion resistance and thermal durability
• OEM-style rear connection integrates directly with Z06/ZR1 factory cat-back exhaust
• Full-length long merge design enhances mid-range torque and refines exhaust tone
• Dyno and race tested for verified performance gains on both LS7 and LS9 platforms
• Manufactured in the USA to Kooks' ISO 9001:2015 certified quality standards
• Backed by Kooks' limited lifetime warranty against defects in materials and workmanship

Specifications

• Pipe Diameter: 3 in.
• X-Pipe Type: Ultra (full-length long merge)
• Catalytic Converters: High-flow (naturally aspirated rated)
• Material: T304 Stainless Steel
• Front Connection: Kooks long tube header collectors
• Rear Connection: OEM Z06/ZR1-style cat-back exhaust
• Weight: 40.6 lbs.
• UPC: 842422182144

Included Components

• 1x Kooks 21613221 3 in. Catted Ultra X-Pipe Assembly
• 2x High-Flow Catalytic Converters (pre-installed)

Product Description

The Kooks 21613221 is a 3 in. stainless steel catted Ultra X-pipe engineered for the 2006-2013 Chevrolet Corvette C6 Z06 and 2009-2013 ZR1. Its full-length Ultra X design improves exhaust scavenging across the RPM range, delivering meaningful horsepower and torque gains over the factory mid-pipe. The rear connection mates directly to the OEM-style cat-back exhaust, while the front connects to Kooks long tube headers - making it the logical centerpiece for a complete Kooks exhaust build on either the LS9 or LS7 platform.

The integrated high-flow catalytic converters help keep the build street-friendly outside of California while still supporting strong flow for naturally aspirated applications. Built from T304 stainless steel, USA-made, and backed by Kooks' lifetime warranty, the 21613221 pairs seamlessly with the full Kooks C6 Z06/ZR1 exhaust lineup for a complete, race-proven exhaust solution.