Hawks Motorsports is pleased to offer our clients the 2006-2013 Chevrolet Corvette C6 Z06/ZR1 2" Long Tube Header & GREEN Connection Kit 7.0L/6.2L, Kooks 2161H631. This Kooks header and connection kit includes 2" x 3" stainless steel long tube headers and a 3" x 3" GREEN catted stainless X-pipe designed to connect to the 3" Z06/ZR1-style exhaust system. The application covers the C6 Z06 with the 7.0L LS7 and C6 ZR1 with the 6.2L LS9.

For the Corvette guy who likes to get under the hood and actually build his car, this is the kind of exhaust hardware that gets your attention. The LS7 and LS9 are serious engines, and feeding them through a set of 2" long tube headers and 3" collectors gives the exhaust side of the build the hardware to match. The GREEN catted X-pipe ties the system together while keeping the 3" exhaust configuration suited to the Z06/ZR1 platform. Whether you're putting together a street-driven Z06, building a nasty weekend Corvette, or turning up the wick on a ZR1, this Kooks setup gives you a purpose-built foundation for the rest of the exhaust system.

Kooks manufactures the headers from 304 stainless steel and uses 2" primary tubes transitioning to 3" collectors. The included 3" x 3" GREEN catted stainless X-pipe connects to the 3" OEM Z06/ZR1-style exhaust configuration. Kooks currently lists the 2161H631 as built to order with an estimated 4–6 week ship window.

The 2161H631 is the 2" version of Kooks' C6 Z06/ZR1 header and GREEN connection package. It should not be confused with the 1-7/8" 2161H431, which uses a smaller primary tube diameter.

KEY FEATURES

• Manufacturer: Kooks Headers and Exhaust
• Part Number: 2161H631
• Product Type: Long Tube Header & GREEN Connection Kit
• Application: 2006-2013 Chevrolet Corvette C6 Z06/ZR1
• Z06 Engine: 7.0L LS7
• ZR1 Engine: 6.2L LS9
• Primary Tube Size: 2"
• Header Configuration: 2" x 3"
• Collector Size: 3"
• X-Pipe Size: 3" x 3"
• Material: 304 Stainless Steel
• Catalytic Converter: GREEN Catted
• X-Pipe: Stainless Steel
• Exhaust Connection: 3" OEM Z06/ZR1-style exhaust
• Construction: Long tube headers
• Current Status: Built to order
• Manufacturer Lead Time: Currently estimated at 4–6 weeks
• Prop 65 Warning: Applies

PRODUCT SPECIFICATIONS

Kooks' current product information confirms the 304 stainless construction, 2" x 3" headers, 3" x 3" GREEN catted stainless X-pipe and 3" OEM Z06/ZR1-style exhaust connection.

VEHICLE FITMENT / FITS THE FOLLOWING MODELS

2006-2013 Chevrolet Corvette C6 Z06

Engine: 7.0L LS7

• 2006 Corvette Z06
• 2007 Corvette Z06
• 2008 Corvette Z06
• 2009 Corvette Z06
• 2010 Corvette Z06
• 2011 Corvette Z06
• 2011 Corvette Z06 Carbon
• 2012 Corvette Z06
• 2013 Corvette Z06
• 2008 Corvette Z06 427 Limited Edition

2009-2013 Chevrolet Corvette C6 ZR1

Engine: 6.2L LS9

• 2009 Corvette ZR1
• 2010 Corvette ZR1
• 2011 Corvette ZR1
• 2012 Corvette ZR1
• 2013 Corvette ZR1

Kooks' current fitment information identifies the 2006-2013 Z06 and 2009-2013 ZR1 applications. Retailer fitment data also identifies the 2011 Z06 Carbon and 2008 427 Limited Edition Z06 among applicable C6 configurations.

Important Fitment Clarification

The title's 2006-2013 range refers to the overall C6 Z06/ZR1 application range. It does not mean every 2006-2013 Corvette is automatically compatible.

The core verified applications are:

• C6 Z06 — 7.0L LS7
• C6 ZR1 — 6.2L LS9

Some third-party catalogs additionally list base C6 and Grand Sport models in their compatibility databases, but that information conflicts with the more specific Kooks product description identifying the kit around the Z06/ZR1 configuration. Hawks should therefore not advertise this as a universal 2006-2013 C6 Corvette fitment.

IMPORTANT APPLICATION NOTES AND EXCLUSIONS

• This is a 2" long tube header and GREEN catted connection kit.
• It is designed for the C6 Z06/ZR1 exhaust configuration.
• The Z06 uses the 7.0L LS7.
• The ZR1 uses the 6.2L LS9.
• The kit uses 3" collectors.
• The included X-pipe connects to the 3" OEM Z06/ZR1-style exhaust.
• Do not confuse 2161H631 with 2161H431, the 1-7/8" version.
• Kooks lists 2161H631 as built to order.
• Current Kooks estimated ship time is 4–6 weeks and may change.
• California customers should verify emissions requirements before purchasing. Kooks' product documentation includes a California Proposition 65 warning, and third-party listings identify the product as not CARB legal/not for sale in California.

Part Number History / Cross-Reference

Kooks documentation indicates that the earlier standard-catted configuration was superseded by 2161H631, which uses the GREEN catalytic converter configuration.

The similar 2161H431 is the 1-7/8" header version and is a separate current SKU.

INSTALLATION NOTES

• Verify the vehicle is a C6 Z06 or ZR1 configuration before ordering.
• Verify the vehicle's existing exhaust configuration and 3" Z06/ZR1-style connection.
• Follow the current Kooks installation instructions.
• Verify exhaust clearance throughout the installation.
• Verify oxygen-sensor routing and connections.
• Inspect the completed system for exhaust leaks.
• Recheck exhaust clearances after installation and heat cycling.
• Long tube header installation should be performed by an experienced installer when the customer does not have the appropriate equipment or experience.

Important: Do not state that tuning is universally required unless Kooks' current installation documentation specifically establishes that requirement for this SKU. A tune may be recommended for a modified vehicle, but that should not be presented as a mandatory product requirement without verification.

FREQUENTLY ASKED QUESTIONS

What Corvettes does Kooks 2161H631 fit?

The 2161H631 is designed for C6 Corvette Z06 and ZR1 applications. The Z06 uses the 7.0L LS7, while the ZR1 uses the 6.2L LS9.

What size headers are included?

The kit includes 2" x 3" stainless steel long tube headers, using 2" primary tubes and 3" collectors.

What catalytic converters does 2161H631 use?

The kit includes Kooks' GREEN catted stainless X-pipe configuration.

What size X-pipe is included?

The included X-pipe is a 3" x 3" GREEN catted stainless X-pipe.

What exhaust does the X-pipe connect to?

Kooks specifies that the connection kit connects to the 3" OEM Z06/ZR1-style exhaust.

What are the headers made from?

The headers are constructed from 304 stainless steel.

Is 2161H631 the same as 2161H431?

No. 2161H631 is the 2" header version, while 2161H431 is the 1-7/8" version.

Does this fit a regular C6 Corvette?

Do not assume so. The verified Kooks application is the C6 Z06/ZR1 configuration. Base and Grand Sport fitment appears in some third-party catalogs, but that conflicts with the specific Kooks application description and should be confirmed before advertising those models as direct fitment.

Is this product CARB legal?

Do not advertise it as CARB legal. Current third-party fitment information identifies 2161H631 as not CARB legal/not for sale in California, while Kooks' current product page carries a California Proposition 65 warning.

Is the product built to order?

Yes. Kooks currently lists 2161H631 as built to order with an estimated 4–6 week ship window.

Header and Connection Kit. 2006-2013 Chevrolet Corvette C6 Z06/ZR1 LS9/LS7 6.2L/7.0L. Includes 2" x 3" Stainless Steel Long Tube Headers & 3" x 3" (OEM) GREEN Catted Stainless X-Pipe. Connects to 3" OEM (Z06/ZR1 Style) Exhaust.

Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!"

* Manufactured In The USA. Kooks Uses T304 Aircraft Quality Stainless Steel. Kooks Products are Backed by a Limited Lifetime Warranty To the Original Purchaser. Kooks Products Are Dyno And Race Tested and Designed For Maximum Power.

material: 304 Stainless Steel
color: Stainless Steel
tube diameter: 3.000 in.
application: Automotive
shape: X Pipe
finish: Stainless Steel

***Kooks is a built to order manufacturer and their focus is providing the best quality parts available.  While their typical lead time is 4-6 weeks, some products may take up to 12 weeks to produce.***