Kooks 21821400 Super Street Headers for the C8 Corvette Grand Sport
The Kooks 21821400 Super Street Series headers are designed for the 2027 and newer C8 Corvette Grand Sport with the 6.7L LS6 V8. Built from 304 stainless steel with 1-7/8-inch primary tubes, they use oval ports and the stock cylinder-head bolt pattern. Flanged collector outlets connect directly to the original catalytic converters or compatible Kooks Super Street OEM connections.
For C8 Grand Sport owners who want to upgrade the headers while retaining the factory catalytic converters, the Super Street design connects directly to those converters and requires no tune for the header installation. The bolt kit is included, but header gaskets are not. Plan to reuse suitable factory gaskets or order replacements from Chevrolet.
Product Details
- Series: Kooks Super Street
- Primary tube diameter: 1-7/8 inches
- Material: 304 stainless steel
- Port shape: Oval
- Mounting: Stock cylinder-head bolt pattern
- Outlet: Flanged collector connection
- Included: Installation bolt kit
- Header gaskets: Not included; reuse suitable factory gaskets or obtain a new set from Chevrolet
Benefits
The 304 stainless steel construction provides corrosion resistance, and the oval ports and stock bolt pattern match the specified Grand Sport application. Compatible Kooks Super Street OEM connections offer another connection option when planning a broader exhaust upgrade.
Important Installation Notes
Confirm gasket condition and availability with your installer before the appointment. Connection pipes are separate components and are not included with the header kit.
The no-tune requirement applies to this header installation. Other engine or exhaust changes may have different requirements. Use installation guidance specific to the 6.7L Grand Sport, including the correct sensor provisions, sealing procedure and clearances.
CORVETTE COMPATIBILITY
- Generation: C8 Corvette
- Model: Grand Sport
- Model years: 2027 and newer
- Engine: 6.7L LS6 V8
Not for C8 Corvette Stingray, E-Ray, Z06 or ZR1.
Shop Kooks 21821400 Super Street headers for your C8 Corvette Grand Sport at Custom Corvette Accessories.
✅ In-stock items ship in 1–2 business days via Standard Ground.
✅ Free shipping items are available in the Continental US only.
✅ Custom quotes available for 2-Day, Next Day, or Saturday delivery.
✅ Custom or backordered items ship as soon as available.
