Kooks 20-25 Chevrolet Corvette Stingray 6.2L V8 2in x 3in SS Headers w/ H.O Green Catted Connection

Maximum Flow, Full Emissions Compliance: Long Tube Power Without the Compromise

The Kooks 2180H640 2-inch x 3-inch long tube headers and H.O. GREEN catted OEM connection pipes kit delivers the ultimate mid-engine exhaust upgrade for 2020 and 2025 Chevrolet Corvette C8 Stingray models with the LT2 6.2L V8, replacing factory manifolds to unlock dyno-proven gains of 40 and 60 rear-wheel horsepower and 35 and 55 lb-ft of torque through equal-length primaries, merged collectors, and high-flow 3-inch x 2-3/4-inch OEM outlet H.O. GREEN catted pipes that bolt directly to the factory exhaust for seamless integration and unrestricted flow from low-end torque to high-RPM redline.

Handcrafted from T304 aircraft-quality stainless steel with 3/8-inch laser-cut flanges, full TIG welds, and 400-cell metallic substrate H.O. GREEN catalytic converters, this system supports over 850 HP while remaining 49-state emissions compliant and preserving the C8's exotic flat-plane V8 soundtrack without drone. The precision design maintains factory ground clearance and heat shielding for daily-driven supercars without sacrificing the aggressive roar during track sessions or spirited drives.

For C8 Stingray owners who demand race-winning performance with street-legal reliability, the 2180H640 kit is the championship-proven, complete bolt-on solution trusted by Corvette enthusiasts worldwide.

Key Features

• 2-inch equal-length mandrel-bent primaries for maximum top-end power
• 3-inch x 2-3/4-inch OEM H.O. GREEN high-flow metallic catalytic converters
• Full T304 stainless steel with TIG welds and 3/8-inch flanges
• Merged collectors for optimal scavenging
• Direct bolt-on to factory exhaust no cutting required
• Dyno gains of 40 and 60 RWHP and 35 and 55 RWTQ on stock LT2

Product Notes

• 49-state EPA compliant not for sale or use in California or CARB states without exemption
• Fits all 2020 and 2025 Corvette C8 Stingray coupe and convertible with LT2 6.2L
• Includes O2 extensions and all necessary hardware

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 required lift and exhaust experience needed
• Remove factory manifolds and bolt headers to cylinder heads
• Connect catted pipes to collectors and OEM exhaust
• Torque flanges to 25-30 ft-lbs and run drive cycle for ECU adaptation

This Part Fits

Note: Fits all C8 Stingray coupe and convertible with factory exhaust. Manual or automatic.

What's Included in the Purchase

• (2) 2" x 3" Long-Tube T304 Stainless Headers with Merged Collectors
• (2) 3" x 2-3/4" OEM H.O. GREEN Catted Connection Pipes
• Gaskets, Stage 8 Locking Bolts, Clamps and Hardware
• O2 Sensor Extensions
• Detailed Installation Instructions
• Part Number: Kooks 2180H640

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 fit the 2025 Stingray?
  A: Yes, direct bolt-on for all 2020 and 2025 C8 Stingray with LT2 6.2L
• Q: Will it cause a check engine light?
  A: No, H.O. GREEN cats and extensions maintain proper O2 function
• Q: How loud is the exhaust?
  A: Exotic flat-plane V8 scream at high RPM, refined and drone-free at cruise
• Do Kooks headers require a tune after installation?
  Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation.
• Will these headers void my factory powertrain warranty?
  Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure. Consult your dealer for specifics on your situation.
• Q: Do these Kooks headers require a tune after installation?
  A: Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation.
• Q: Will Kooks headers void my factory powertrain warranty?
  A: Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure in question. Consult your dealer for specifics.
• Q: What warranty does Kooks provide?
  A: Kooks products are backed by a limited lifetime warranty to the original purchaser against defects in materials and workmanship. Racing and competition use applications may have specific warranty exclusions. Contact Kooks Performance directly for warranty details.

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.