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SKU: 21703200 | UPC: 842422138967
Kooks 3" GREEN Catted X-Pipe for 2014–2019 Chevrolet Corvette C7 LT1 6.2L
The Kooks 21703200 3-inch GREEN catted X-pipe completes the exhaust upgrade on 2014–2019 Corvette C7 Stingray, Grand Sport, and Z06 models with the LT1 6.2L V8, linking Kooks long tube headers directly to the factory NPP dual-mode mid-pipe for seamless integration that maintains 49-state emissions compliance while adding 20–30 rear-wheel horsepower and 25–35 lb-ft of torque through high-flow 300-cell metallic substrate GREEN catalytic converters and mandrel-bent crossover design for balanced exhaust flow.
Handcrafted from T304 aircraft-quality stainless steel with 3/8-inch laser-cut flanges and full TIG welds, this X-pipe ensures zero leaks under extreme heat and supports over 850 HP from tunes or cams without sacrificing ground clearance or daily drivability. The crossover configuration equalizes cylinder pulses for smoother power delivery and a deeper, more aggressive V8 note in track mode with zero drone at cruise.
For C7 LT1 owners pairing Kooks headers with stock exhaust, the 21703200 GREEN catted X-pipe is the essential emissions-legal link that maximizes performance with supercar refinement.
Key Features
- 3-inch mandrel-bent T304 stainless steel X-pipe
- GREEN 300-cell high-flow metallic catalytic converters
- Direct bolt-on to Kooks headers and OEM NPP mid-pipe
- 3/8-inch laser-cut flanges with full TIG welds
- Supports 850+ HP with proper tuning
- Balances exhaust for smoother power and sound
Product Notes
- 49-state EPA compliant not for sale or use in California or CARB states without exemption
- Requires Kooks long tube headers for proper fitment
- Preserves NPP dual-mode valve operation
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: Limited lifetime on stainless construction and 25,000 miles on catalytic converters to original purchaser.
Installation Notes
- Professional installation recommended lift required
- Bolt X-pipe to Kooks header collectors with supplied gaskets
- Connect to OEM NPP mid-pipe using included hardware
- Torque flanges to 25-30 ft-lbs and check for leaks after heat cycle
This Part Fits
| Year | Make | Model | Submodel/Engine |
|---|---|---|---|
| 2014–2019 | Chevrolet | Corvette | Stingray / Grand Sport / Z06 - LT1 6.2L Dry Sump |
Note: Fits all C7 with Kooks long tube headers and factory NPP exhaust. Coupe or convertible.
What's Included in the Purchase
- (1) 3" GREEN Catted X-Pipe
- Gaskets and Flange Hardware Kit
- Detailed Installation Instructions
- Part Number: Kooks 21703200
Why Choose Kooks?
- Over 60 years of championship-winning exhaust engineering
- Handcrafted in the USA from T304 aircraft-quality stainless steel
- Limited lifetime warranty and dyno-proven performance
Frequently Asked Questions
-
Q: Does this work with factory headers?
A: No, designed specifically for Kooks long tube headers -
Q: Is it emissions legal?
A: Yes, 49-state EPA compliant with GREEN cats -
Q: Does it keep NPP valves working?
A: Yes, full dual-mode NPP function retained
Shipping & Handling
- Method: UPS or Fed Ex Ground.
- Availability: Typically ships same day or next if in stock.
- Packaging: Heavy-duty box with foam protection.
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