Kooks 97-04 Chevrolet Corvette Base 1-7/8 x 3 Header & Catted X-Pipe Kit

Kooks 1-7/8" x 3" Long Tube Headers & Catted X-Pipe for 1997–2004 Chevrolet Corvette C5 LS1/LS6 5.7L

The Kooks 2150H420 1-7/8-inch long tube headers and catted X-pipe kit unleashes the full potential of the 1997–2004 Chevrolet Corvette C5 with LS1 or LS6 5.7L V8 by replacing factory manifolds with equal-length primaries and a high-flow 3-inch x 3-inch catted X-pipe that connects to the 2-1/2-inch OEM exhaust, delivering dyno-proven gains of 45–60 rear-wheel horsepower and 40–55 lb-ft of torque across the entire RPM range for sharper acceleration and stronger mid-range pull.

Handcrafted from T304 aircraft-quality stainless steel with 3/8-inch laser-cut flanges, merged collectors, and 300-cell metallic substrate catalytic converters, this system ensures 49-state emissions compliance while supporting up to 700+ HP from cams, intake, or forced induction upgrades. The precision engineering maintains ground clearance and heat management for daily-driven C5s without compromising the iconic V8 rumble that turns heads at car shows or stoplights.

For C5 Corvette owners who want race-winning performance with street-legal reliability, the 2150H420 kit is the championship-proven, complete bolt-on solution trusted by generations of LS enthusiasts.

Key Features

• 1-7/8-inch equal-length mandrel-bent primaries for optimal scavenging
• 3-inch x 3-inch catted X-pipe with high-flow metallic substrate
• Full T304 stainless steel with TIG welds and 3/8-inch flanges
• Merged collectors for maximum exhaust velocity
• Direct connection to 2-1/2-inch OEM exhaust no cutting required
• Dyno gains of 45–60 RWHP and 40–55 RWTQ on stock LS1/LS6

Product Notes

• 49-state EPA compliant not for sale or use in California or CARB states without exemption
• Fits manual and automatic transmissions with LS1/LS6 5.7L
• Includes O2 sensor fittings and air tube provisions for emissions

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
• Remove factory manifolds and bolt headers to cylinder heads
• Connect X-pipe to collectors and OEM exhaust with supplied hardware
• Torque flanges to 25-30 ft-lbs and run drive cycle for ECU adaptation

This Part Fits

Note: Fits all C5 Corvette coupe and convertible with LS1/LS6 5.7L. Excludes LT1 models.

What's Included in the Purchase

• (2) 1-7/8" x 3" Long-Tube T304 Stainless Headers with Merged Collectors
• (1) 3" x 3" x 2-1/2" Catted Stainless X-Pipe
• Gaskets, Stage 8 Locking Header Bolts, Clamps and Hardware
• O2 Sensor Extensions and Fittings
• Detailed Installation Instructions
• Part Number: Kooks 2150H420

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 my 2001 Z06 LS6?
  A: Yes, direct bolt-on for all 1997–2004 C5 with LS1/LS6 5.7L
• Q: Will it cause a check engine light?
  A: No, catted X-pipe and included extensions keep sensors in position
• Q: How loud is the exhaust?
  A: Deep aggressive V8 rumble, refined without drone at highway speeds

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.