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.
Match your earlier C6 headers with the right revised X-pipe
Complete your revised Kooks header installation on your 2005-2008 Corvette with a three-piece stainless X-pipe. Choose Competition Only, Performance or GREEN connections, with 3" to 2-1/2" mid-pipes and all necessary installation clamps supplied.
SKUs: 21603101, 21603201, 21603301
For the revised TORCA header connection
The inlet uses the TORCA Swivel-Seal arrangement and requires the matching revised Kooks headers. It does not fit the older two-bolt header flanges. Match that joint style before choosing the crossover for an existing installation.
Retain the base-Corvette rear interface
The included mid-pipes transition to the 2-1/2" OEM-style rear exhaust. Performance cats suit naturally aspirated engines; GREEN supports forced induction. Competition Only is the uncatted competition choice. The fitment table separates LS2 6.0 and LS3 6.2 years.
The GREEN catalysts in 21603301 are rated for up to 750 wheel horsepower.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 21603101 | Model Year: 2005-2008; Cat Type: Comp. Only | Competition Only connection assembly; 3" to 2-1/2" mid-pipes and necessary clamps included | Revised Kooks TORCA Swivel-Seal headers only; Uncatted; competition use |
| 21603201 | Model Year: 2005-2008; Cat Type: Performance Cats | Performance Cats connection assembly; 3" to 2-1/2" mid-pipes and necessary clamps included | Revised Kooks TORCA Swivel-Seal headers only; Naturally aspirated only |
| 21603301 | Model Year: 2005-2008; Cat Type: GREEN Cats | GREEN Cats connection assembly; 3" to 2-1/2" mid-pipes and necessary clamps included; GREEN catalysts rated up to 750 wheel horsepower | Revised Kooks TORCA Swivel-Seal headers only |
Matching products
The revised C6 TORCA headers provide the matching Swivel-Seal joint. Choose the X-pipe year range for your own LS2 or LS3 Corvette.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2005-2007 | Chevrolet Corvette Base | 6.0L V8 | 21603101, 21603201, 21603301 | Revised Kooks TORCA Swivel-Seal headers only |
| 2008 | Chevrolet Corvette Base | 6.2L V8 | 21603101, 21603201, 21603301 | Revised Kooks TORCA Swivel-Seal headers only |
Intended use
21603101, 21603201: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 21603101.
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 |
|---|---|
| SKUs | 21603101, 21603201, 21603301 |
| Applications | 2005-2007 C6 Base LS2 6.0L; 2008 C6 Base LS3 6.2L |
| Material | 304 stainless steel |
| Header interface | TORCA Swivel-Seal; revised Kooks headers only |
| X-section | Three piece; 3" pipework |
| Included rear transitions | 3" to 2-1/2" mid-pipes |
| Rear outlet | 2-1/2" OEM-style exhaust |
| Clamps | All necessary installation clamps included |
| Choices | Competition Only; Performance; GREEN |
| Performance condition | Naturally aspirated only |
| Excluded front interfaces | OEM manifolds/cats and old two-bolt Kooks header flanges |
| 21603301 catalyst rating | Up to 750 wheel horsepower |
Frequently asked questions
Does this fit the Z06 3-inch rear interface?
This set transitions to the 2-1/2" base-Corvette rear interface.
Can I use it with old two-bolt Kooks headers?
Choose connections made for the older flange. These X-pipes require the revised TORCA joint.
Are the rear transitions included?
Yes. The mid-pipes and necessary installation clamps are supplied.
