C7 Corvette Headers: 5 Kooks & Stainless Works Kits for Your Build
Your C7 already has the looks. Now let’s talk about the hardware under the hood and the exhaust pieces that need to work together.
At Merrick Motorsports, we offer C7 Corvette header packages from Kooks Headers and Stainless Works, with choices in primary diameter and catted X-pipe configuration. This guide compares five catalog packages, plus two separate Kooks X-pipes and an O2 sensor extension harness. That’s eight products to explore without confusing a supporting part with a complete header kit.
The smart move is to choose a matched system for your exact Corvette, not just the biggest tubing in the search results. Confirm your model year, trim, engine, existing exhaust, and manufacturer requirements before ordering.
1. Kooks 1-7/8-inch headers with catted X-pipe: 2170H420
This package is listed with 1-7/8-inch primaries, 3-inch outlets, and a catted X-pipe. Its product title specifically names the 2014–2019 Corvette Stingray, Z51, and Grand Sport. Start here if you want to compare a Kooks header-and-X-pipe package rather than piece together separate listings.
The catalog fitment table is broader than the title, so confirm your exact application with us before purchase, especially for a Z06 or ZR1. The product photo shows the headers; use the listing and manufacturer specifications to confirm everything supplied with the kit.
Shop Kooks 2170H420 header and catted X-pipe kit.
2. Kooks 1-7/8-inch headers with GREEN catted X-pipe: 2170H430
Want to compare another 1-7/8-inch Kooks package? The 2170H430 listing pairs that primary size with a 3-inch connection and a GREEN catted X-pipe. It is a separate package from 2170H420, so match the part number rather than shopping by the header photo alone.
The GREEN designation identifies this catalog configuration. It is not, by itself, a promise of emissions approval for your vehicle or location. Confirm the exact manufacturer documentation for your intended use.
Shop Kooks 2170H430 GREEN catted header kit.
3. Kooks 2-inch headers with GREEN catted X-pipe: 2170H630
The 2170H630 gives you a 2-inch-primary Kooks option with a 3-inch connection and GREEN catted X-pipe. Put this alongside the 1-7/8-inch packages when discussing your build with your installer.
Bigger is a dimension, not an automatic recommendation. Choose around the complete engine and exhaust combination rather than assuming the largest listed primary size is the right answer for every C7.
Shop Kooks 2170H630 2-inch header kit.
4. Stainless Works 1-7/8-inch headers with high-flow cats and X-pipe: C7188CAT
This Stainless Works package lists long-tube headers with 1-7/8-inch primaries, a 31-inch primary-tube length, and 3-inch slip-fit collectors. The description includes a 3-inch catted center section with an X-pipe and identifies the factory axle-back connection point.
That makes it a useful option to compare if retaining the factory axle-back connection is part of your plan. Confirm compatibility with the exhaust actually on your car, particularly if previous owners have already changed components.
Shop Stainless Works C7188CAT.
5. Stainless Works 2-inch headers with high-flow cats and X-pipe: C72CAT
The C72CAT listing steps up to 2-inch primaries with a 31-inch primary length and 3-inch slip-fit collectors. Its description includes a 3-inch high-flow catted center section with X-pipe, CNC mandrel-bent tubing, TIG welding, and a factory axle-back connection point.
One detail deserves attention: the product title says 2014–18, while its fitment table also lists 2019 Corvette applications. Ask us to confirm your exact year and trim before ordering rather than treating that mismatch as a guaranteed fit.
More options: matching X-pipes and installation accessories
Already working with a Kooks header setup? These supporting products are worth checking, but they are not additional complete header kits.
Kooks catted stainless X-pipe: 21703200
A separately listed 3-inch-by-3-inch catted stainless X-pipe. The title specifies that Kooks headers are required, so do not assume it connects to factory manifolds or another brand’s headers.
Kooks GREEN catted stainless X-pipe: 21703300
The separate 3-inch-by-3-inch GREEN catted X-pipe option, also listed as requiring Kooks headers. Compare this with 21703200 by exact part number and manufacturer specifications before choosing.
Kooks C7 O2 sensor extension harness
This harness is listed for the 2014–2019 C7 Corvette. Have your installer confirm whether your selected system needs it and whether the required extensions are already included in your package. It is an installation accessory, not a header or X-pipe.
View the Kooks C7 O2 sensor extension harness.
How to narrow down your C7 header choices
- Match the car: provide the year, trim, engine, and existing modifications.
- Compare complete combinations: distinguish header-and-X-pipe packages from separate X-pipes.
- Choose the primary diameter intentionally: discuss the 1-7/8-inch and 2-inch options with your installer in the context of the whole build.
- Check connection points: confirm compatibility with your existing axle-back and any aftermarket exhaust pieces.
- Confirm the details: ask about package contents, sensor extensions, installation requirements, and manufacturer guidance before buying.
These listings do not establish emissions approval for your particular vehicle and location. Do not assume a catalytic converter or the word GREEN guarantees approval; check the applicable manufacturer documentation before purchase or installation.
Build the system, not a pile of mismatched parts
Whether you are comparing Kooks configurations or the Stainless Works packages, start with the exact car and the exact part number. No mystery fitment, no shopping by photo alone, and no buying the same X-pipe twice.
Contact Merrick Motorsports with your C7’s year, trim, engine, current exhaust, and the part numbers you are considering. We can help you narrow down the options before the car goes on the lift.
Product specifications above reflect the linked catalog listings. Photos are catalog product images and may not show every item supplied. Confirm exact fitment, package contents, current availability, and intended-use requirements before ordering. No specific horsepower gain is promised.