Kooks 14-19 Chevrolet Corvette Stingray Z51 Grand Sport 1-7/8 x 3 Header & Catted X-Pipe Kit

Kooks 1-7/8" x 3" Long Tube Headers & Green Catted Connection Pipes for 2014 and 2019 Chevrolet Corvette C7 LT1 6.2L

The Kooks 2170H420 1-7/8-inch long tube headers and Green catted connection pipes give 2014 and 2019 Corvette C7 Stingray, Grand Sport, and Z06 owners with the dry-sump LT1 6.2L V8 the perfect torque-focused upgrade, delivering dyno-proven 50 and 65 rear-wheel horsepower and 45 and 60 lb-ft of torque gains through equal-length primaries, merged collectors, and high-flow 3-inch GREEN catted pipes that bolt straight to the factory NPP dual-mode exhaust.

Hand-built from T304 aircraft-quality stainless steel with 3/8-inch laser-cut flanges and 300-cell metallic substrate cats, this system supports over 800 HP while staying 49-state emissions legal and retaining full NPP valve operation for quiet cruising or wide-open track sound. The design keeps factory ground clearance and heat shielding for daily-driven C7s without sacrificing the legendary Corvette V8 soundtrack.

For C7 LT1 owners who want massive mid-range punch with daily-driver manners, the 2170H420 kit is the championship-proven, complete bolt-on solution trusted by Corvette racers and enthusiasts everywhere.

Key Features

• 1-7/8-inch equal-length primaries for strong mid-range torque
• 3-inch GREEN high-flow metallic catalytic converters
• Full T304 stainless steel with TIG welds and 3/8-inch flanges
• Preserves factory NPP dual-mode exhaust function
• Direct bolt-on to OEM mid-pipe no cutting required
• 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 all 2014 and 2019 C7 with dry-sump LT1 6.2L (Stingray, Grand Sport, Z06)
• 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 NPP mid-pipe
• Torque flanges to 25-30 ft-lbs and run drive cycle for ECU

This Part Fits

Note: Fits all 2014 and 2019 C7 with factory NPP exhaust. Excludes wet-sump and ZR1 models.

What's Included in the Purchase

• (2) 1-7/8" x 3" Long-Tube T304 Stainless Headers with Merged Collectors
• (2) 3" Green Catted Connection Pipes
• Gaskets, Stage 8 Locking Bolts, Clamps and Hardware
• O2 Sensor Extensions
• Detailed Installation Instructions
• Part Number: Kooks 2170H420

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 NPP dual-mode function is retained
• Q: Will it fit my 2018 Grand Sport?
  A: Yes, direct bolt-on for all 2014 and 2019 C7 LT1 dry-sump models
• Q: How much louder is it?
  A: Aggressive in track mode, refined and drone-free in tour/eco
• 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 wooden crate with foam protection.