Know the landed cost before you order
Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.
Hear more of your C7 with the rear exhaust retained
Change the resonator section of your Corvette while keeping the factory manifolds, catalytic converters and axle-back. Kooks 21703000 gives the listed 2014-2019 C7 a 3-inch stainless X-pipe with the matching front and rear connection sizes.
SKU: 21703000
Made for the factory-manifold exhaust
The OEM-size front connection, 3-inch X-section and 3-inch-to-2-3/4-inch mid-pipes join the retained factory parts. This is the OEM-manifold resonator-delete choice for the listed LT1 / LT4 / LT5 applications.
Keep the parts that shape your existing sound
Your original cats and axle-back remain in the system, while the factory resonators are replaced. The final sound depends on those retained parts, so this is a focused middle-section change.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2014-2019 | Chevrolet Corvette Stingray | 6.2L V8 | 21703000 | OEM manifolds / cats / axle-back retained; not the Kooks-header connection |
| 2014-2016 | Chevrolet Corvette Z51 | 6.2L V8 | 21703000 | OEM manifolds / cats / axle-back retained; not the Kooks-header connection |
| 2015-2019 | Chevrolet Corvette Z06 | 6.2L V8 | 21703000 | OEM manifolds / cats / axle-back retained; not the Kooks-header connection |
| 2017-2019 | Chevrolet Corvette Grand Sport | 6.2L V8 | 21703000 | OEM manifolds / cats / axle-back retained; not the Kooks-header connection |
| 2019 | Chevrolet Corvette ZR1 | 6.2L V8 | 21703000 | OEM manifolds / cats / axle-back retained; not the Kooks-header connection |
Intended use
21703000: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 21703000.
Ordering and delivery
Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.
Technical specifications
| Specification | Details |
|---|---|
| SKU | 21703000 |
| Application | 2014-2019 Corvette C7 LT1 / LT4 / LT5 6.2L |
| X-pipe diameter | 3-inch |
| Front connection | OEM-size front connection; factory manifolds and cats retained |
| Mid-pipe diameters | 3-inch x 2-3/4-inch |
| Retained rear parts | Factory axle-back |
| Replaces | Factory resonators |
| Fitting | Designed for OEM manifolds, not Kooks headers |
| Material | 304 stainless steel |
Frequently asked questions
Does this fit behind Kooks long tube headers?
21703000 is designed for the OEM-manifold exhaust. Choose the matching Kooks-header crossover for a long tube installation.
Do the catalytic converters remain?
Yes. The OEM manifolds, catalytic converters and axle-back are retained with this resonator-delete product.
