C5 Corvette KOOKS Headers 1-7/8" with High Flow Cats (1997–2004) – 2152H420
If you want a real performance change on a C5 Corvette, long tube headers are one of the first upgrades drivers feel immediately. The KOOKS 1-7/8" long tube headers with high flow cats (Part Number: 2152H420) are engineered for 1997–2004 C5 Corvette models including C5 Corvette Base, C5 Corvette FRC, and C5 Corvette Z06 equipped with the LS1 or LS6 engine. This is a street-focused, catted header system designed to improve exhaust scavenging, sharpen throttle response, and deliver a deeper exhaust tone under load.
Product Details
- KOOKS long tube header system with high flow cats
- Designed for C5 Corvette Base, FRC, and Z06 models
- Engine-specific fitment for LS1 and LS6 platforms
- 1-7/8" primary tubes with 3" collectors
- Street-friendly catted configuration
- Manual and automatic transmission compatible
Why KOOKS Leads in C5 Corvette Header Design
The C5 Corvette responds extremely well to reduced exhaust restriction and improved scavenging. Compared to factory manifolds, long tube headers increase primary length and help the LS1 and LS6 engines evacuate exhaust more efficiently through the midrange. Many C5 owners ask whether headers are worth it on a mostly stock car—once tuned correctly, the improvement in throttle response and overall pull is immediately noticeable.
Benefits
- Stronger midrange response for street driving
- Improved exhaust flow over factory manifolds
- Deeper, more aggressive exhaust character under throttle
- Engine-specific design for LS1 and LS6 platforms
- 304 stainless steel construction for long-term durability
What to Expect After Installation
After installation, most C5 Corvette owners notice a sharper throttle feel and a more authoritative exhaust tone. If you’re concerned about sound levels, overall volume and drone characteristics are largely determined by the rear exhaust system paired with the headers.
- More pronounced exhaust tone under acceleration
- Improved engine response once tuned
- Enhanced driving engagement on the street
Technical Specifications
- KOOKS Part Number: 2152H420
- Primary Tube Diameter: 1-7/8"
- Collector Diameter: 3"
- Material: 304 stainless steel
- Vehicle Platform: C5 Corvette (LS1 / LS6)
Installation Overview
This system fits the 1997–2004 C5 Corvette Base, FRC, and Z06 when selected correctly. Installation is considered advanced due to access, fastener clearance, O2 sensor handling, and exhaust alignment.
- Direct-fit installation for C5 Corvette applications
- No cutting or welding required with proper configuration
- O2 sensor routing and heat management required
- Professional installation recommended
Tuning requirement: C5 Corvette LS1 and LS6 engines require tuning after installing long tube headers. Avoid hard driving until the vehicle is properly calibrated to prevent lean operation.
Corvette Compatibility
- C5 Corvette Base (LS1): 1997–2004
- C5 Corvette FRC (LS1): 1999–2000
- C5 Corvette Z06 (LS6): 2001–2004
- Transmission: Manual and automatic
Cross-Compatibility & Related Fitment
- Designed exclusively for C5 Corvette Base, FRC, and Z06 models
- Not compatible with C6 or newer Corvette platforms
- Not compatible with C5 Corvette engine swaps outside LS1/LS6 without additional fitment planning
Testimonials
“Once it was tuned, the throttle response and sound were exactly what I wanted from my C5.”
Since 2007, CCA has specialized in Corvette-specific performance parts, helping owners choose platform-correct upgrades with confidence.
KOOKS headers 2152H420 are one of the best upgrades for C5 Corvette owners who want improved response and a deeper exhaust character. Order today for fast nationwide shipping on in-stock items.