Kooks 218133BK Catted Connections for C8 Corvette Grand Sport and Grand Sport X
Choose the Kooks 218133BK Ultra-GREEN catted connection kit with heat blankets for your 2027 C8 Corvette Grand Sport or Grand Sport X with the 6.7L LS6 V8. The kit brings together both catted connections, matching Kooks heat blankets, and the gasket and bolt kit. Its 3-inch 304 stainless steel tubing and 5-inch catalyst bodies connect the OEM manifolds or Kooks headers to the OEM cat-back through stock-pattern flanges. Confirm your complete exhaust configuration before ordering.
This kit addresses the catalytic-converter section of your exhaust. The exhaust connection sequence is OEM manifolds or Kooks headers → these catted connections → OEM cat-back. That distinction matters when comparing exhaust parts: 218133BK includes the catalysts and blankets together; headers, rear mufflers and exhaust tips are separate components.
Product Details
- Brand and part number: Kooks 218133BK
- Product: Ultra-GREEN catted connection pair with heat blankets
- Position: Replaces the original catalytic converters between the manifolds or headers and rear cat-back
- Connection tubing: 3-inch 304 stainless steel
- Catalyst bodies: 5-inch-bodied Ultra-GREEN; this dimension describes the catalyst bodies, not the exhaust pipe or tips
- Connections: Flanged inlet and outlet with the stock bolt pattern
- Included: Both catted connections, Kooks 218133B2 heat blankets, and gasket and bolt kit
Benefits
- One matched catalyst-and-blanket kit: The included 218133B2 blankets are supplied with the catted connections, so you can identify the complete package rather than inadvertently selecting a blanket-only part.
- Plan around the factory rear exhaust: The OEM cat-back interface lets you focus on the catalyst section without treating rear mufflers and tips as part of this purchase.
- Two engine-side interfaces: The connections accommodate OEM manifolds or Kooks headers. If your car already has aftermarket components, confirm their exact part numbers and interfaces before ordering.
Important Notes
- Confirm your sound or power goals: If your goal is a particular sound or power change, confirm the result for your complete configuration before choosing parts.
- Check the complete combination: Identify your 2027 Grand Sport or Grand Sport X, NPP equipment, center-exit or corner-exit rear exhaust, and the make and part number of any existing headers or cat-back. Exact exhaust-option compatibility must be confirmed.
- Confirm installation and calibration: Have a qualified installer verify the GS or GSX procedure, sensor provisions and calibration requirements for your setup. Ask whether your exact combination needs tuning or further checks for warning-light behavior.
- Verify emissions eligibility before purchase: This kit replaces original catalytic converters. Ultra-GREEN branding does not by itself establish approval for your vehicle and location or guarantee an inspection pass.
- Plan the installation date: Confirm current availability and lead time before scheduling work.
CORVETTE COMPATIBILITY
- Generation: C8 Corvette
- Model year: 2027
- Models: Grand Sport and Grand Sport X
- Engine: 6.7L LS6 V8
- Transmission: Eight-speed dual-clutch
- Exhaust interfaces: OEM manifolds or Kooks headers to OEM cat-back; confirm your exact equipment combination
Why Buy This Product from Custom Corvette Accessories
Compare the exact 218133BK kit, its included pieces and its 2027 Grand Sport or Grand Sport X fitment in one place. Before ordering, contact Custom Corvette Accessories with your trim, NPP equipment and current exhaust part numbers so any remaining fitment and installation questions can be addressed for the parts you plan to use.
✅ 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.
