Kooks 09-13 Chevrolet Corvette LS3 6.2L 1-7/8 x 3 Header & Green Catted X-Pipe Kit

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

The Kooks 1-7/8-inch long tube headers and GREEN catted X-pipe kit delivers the definitive bolt-on exhaust upgrade for 2009 and 2013 Corvette C6 base, Grand Sport, and 427 Convertible models with the LS3 6.2L V8, replacing factory manifolds to unlock dyno-proven gains of 50 and 65 rear-wheel horsepower and 45 and 60 lb-ft of torque through equal-length primaries, merged collectors, and a high-flow 3-inch GREEN catted X-pipe that bolts directly to the OEM NPP dual-mode exhaust while preserving full valve operation.

Hand-built from T304 aircraft-quality stainless steel with 3/8-inch laser-cut flanges, full TIG welds, and 400-cell metallic substrate GREEN cats, this system supports over 800 HP while remaining 49-state emissions legal and offering the perfect balance of aggressive V8 roar in track mode and refined quietness in tour. The precision design maintains factory ground clearance and heat shielding for daily-driven C6s without sacrificing the legendary Corvette soundtrack.

For 2009 and 2013 C6 LS3 owners who demand race-winning performance with street-legal reliability, the 2160H432 kit is the championship-proven, complete bolt-on solution trusted by Corvette enthusiasts worldwide.

Key Features

• 1-7/8-inch equal-length primaries for strong mid-range and top-end power
• 3-inch 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 NPP exhaust retains dual-mode function
• Dyno gains of 50 and 65 RWHP and 45 and 60 RWTQ

Product Notes

• 49-state EPA compliant not for sale or use in California or CARB states without exemption
• Fits 2009 and 2013 C6 base, Grand Sport, and 427 Convertible with LS3 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 X-pipe to collectors and OEM NPP mid-pipe
• Torque flanges to 25-30 ft-lbs and run drive cycle for ECU

This Part Fits

Note: Fits all C6 coupe and convertible with factory NPP exhaust. Manual or automatic.

What's Included in the Purchase

• (2) 1-7/8" x 3" Long-Tube T304 Stainless Headers with Merged Collectors
• (1) 3" x 3" GREEN Catted Stainless X-Pipe
• Gaskets, Stage 8 Locking Bolts, Clamps and Hardware
• O2 Sensor Extensions
• Detailed Installation Instructions
• Part Number: Kooks 2160H432

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 keep NPP valves working?
  A: Yes, full dual-mode NPP function is retained
• Q: Will it fit my 2013 Grand Sport?
  A: Yes, direct bolt-on for all 2009 and 2013 C6 LS3 models
• Q: How loud is it?
  A: Aggressive V8 roar in track mode, refined and quiet in tour mode
• 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.