C7 Corvette KOOKS Headers 1-7/8" with High Flow Cats (2014–2019) – 2170H420
If you want a real performance change on a C7 Corvette, headers are one of the first upgrades drivers feel immediately. The KOOKS 1-7/8" long tube headers with high flow cats (Part Number: 2170H420) are engineered for 2014–2019 C7 Corvette Stingray, C7 Corvette Grand Sport, and C7 Corvette Z06 with both manual and automatic transmissions. This street-focused system improves exhaust scavenging, sharpens throttle response, and delivers a deeper, more aggressive exhaust character under load without sacrificing drivability.
Product Details
- KOOKS Part Number: 2170H420
- Header configuration: Long tube headers with integrated high flow catalytic converters
- Primary tube size: 1-7/8"
- Collector size: 3"
- Material: 304 stainless steel
- Engine compatibility: LT1 and LT4 platforms
- Transmission compatibility: Manual and Automatic
Why KOOKS Leads in Corvette Long Tube Headers
KOOKS designs Corvette headers around real-world fitment, thermal management, and consistent manufacturing quality. On the C7 Corvette platform, routing precision and flange integrity matter just as much as airflow. Many C7 owners ask whether headers are worth it on a mostly stock car—and once tuned, the improvement in midrange response and throttle feel is immediately noticeable.
Benefits
- Improved midrange performance: enhanced scavenging helps the engine breathe more efficiently
- Sharper throttle response: quicker reaction once calibration matches airflow
- Deeper exhaust tone: headers change the character under load while the cat-back controls final volume
- Street-friendly catalyst strategy: high flow cats maintain daily usability
- Durable construction: 304 stainless steel built to handle repeated heat cycles
What to Expect After Installation
Once installed and properly tuned, most drivers notice stronger midrange pull and a more responsive feel through normal driving ranges. If you’re wondering whether headers will make the car too loud, the answer depends largely on the rear exhaust system. Headers shape the tone, while the cat-back determines drone and highway comfort.
- More urgent acceleration under throttle
- Improved engine response in everyday driving
- Aggressive exhaust character when pushed
Technical Specifications
- Part Number: 2170H420
- Header Type: Long tube headers with high flow catalytic converters
- Primary Tube Diameter: 1-7/8"
- Collector Diameter: 3"
- Material: 304 stainless steel
- Engine Fitment: LT1 (C7 Corvette Stingray / Grand Sport), LT4 (C7 Corvette Z06)
- Transmission Fitment: Manual and Automatic
Installation Overview
This system fits the 2014–2019 C7 Corvette platform exactly when selected for the correct trim and engine. Installation is considered advanced due to access, exhaust alignment, and sensor handling.
- Direct-fit installation using factory-style mounting locations
- No cutting or welding required for standard header installation
- O2 sensor handling and routing are required
- Estimated install time: 4–10+ hours depending on experience
- Professional installation recommended
Tuning required: Long tube headers alter airflow significantly. A tune is required after installation to prevent lean operation and drivability issues.
Vehicle Fitment & Specifications
| Generation: | C7 |
| Model Years: | 2014 - 2019 |
| Trim Level: | Stingray, Grand Sport, Z06, ZR1 |
| Engine Code: | LT1, LT4, LT5 |
| Transmission Type: | Manual, Automatic |
| Intended Use: | Street, Track |