Product Description:
Hawks Motorsports is pleased to offer our clients the 2006-2013 Chevrolet Corvette C6 Z06/ZR1 3" Valved Shotgun Axle-Back Exhaust with Carbon Fiber Tips, Kooks 21606750. This Kooks 3" axle-back exhaust features a shotgun-style valved design, 3" 304 stainless steel tubing and four 3" carbon fiber exhaust tips. The system is designed to connect to the OEM mid-section or to a Kooks header and X-pipe combination, giving C6 Z06 and ZR1 owners a performance-oriented rear exhaust upgrade without replacing the complete exhaust system.
The C6 Z06 and ZR1 already have the kind of engines that make you want to hear every pull through the gears, and this axle-back gives the rear of the car the hardware to match. The 3" tubing, shotgun-style mufflers and four carbon fiber tips give the exhaust a much more purposeful look, while the valves let you change the character of the car depending on how you're driving it. Leave it comfortable when you're cruising or open things up when you're ready to let the LS7 or LS9 make some noise. It's a straightforward way to give a C6 a more aggressive exhaust presence without replacing everything from the headers back.
The system is constructed from 304 stainless steel and uses 3" tubing. Kooks describes the system as a 3" Shotgun Style Valved Axleback with Carbon Fiber Tips. The four tips are 3" in diameter and feature a carbon fiber finish with a beveled, double-wall edge.
The 21606750 is designed to connect to the OEM mid-section or to a Kooks headers and X-pipe combination. This makes it possible to use the axle-back with the factory-style mid-section or as part of a more extensive Kooks exhaust system.
Kooks currently lists this product as built to order in North Carolina, with an estimated 4-6 week ship window. Actual production time can vary.
KEY FEATURES
- Manufacturer: Kooks Headers & Exhaust
- Part Number: 21606750
- Product Type: Valved Axle-Back Exhaust
- Design: Shotgun-style
- Application: C6 Corvette Z06/ZR1
- Primary Tube Diameter: 3"
- Material: 304 Stainless Steel
- Finish: Stainless Steel
- Exhaust Tips: Carbon Fiber
- Tip Quantity: 4
- Tip Diameter: 3"
- Tip Shape: Round
- Tip Edge: Beveled, double-wall
- Valves: Integrated exhaust valves
- OEM Connection: Yes
- Kooks Header/X-Pipe Connection: Yes
- Catalytic Converters: Not included
- Condition: New
- Manufacturer Status: Built to order
The manufacturer confirms the 304 stainless construction, 3" tubing, valved shotgun design and carbon fiber tips.
PRODUCT SPECIFICATIONS
| Specification | Details |
|---|---|
| Manufacturer | Kooks Headers & Exhaust |
| Part Number | 21606750 |
| Product Type | Valved Axle-Back Exhaust |
| Design | Shotgun Style |
| Tubing Diameter | 3.000" |
| Material | 304 Stainless Steel |
| Tip Material/Finish | Carbon Fiber |
| Tip Quantity | 4 |
| Tip Diameter | 3.000" |
| Tip Shape | Round |
| Tip Edge | Beveled, Double-Wall |
| Exhaust Valves | Yes |
| OEM Mid-Section Connection | Yes |
| Kooks Header/X-Pipe Connection | Yes |
| Catalytic Converters | Not Included |
| Condition | New |
| Production | Built to Order |
VEHICLE FITMENT / FITS THE FOLLOWING MODELS
2006-2013 Chevrolet Corvette C6 Z06
7.0L LS7
- 2006 Corvette Z06
- 2007 Corvette Z06
- 2008 Corvette Z06
- 2009 Corvette Z06
- 2010 Corvette Z06
- 2011 Corvette Z06
- 2012 Corvette Z06
- 2013 Corvette Z06
2009-2013 Chevrolet Corvette C6 ZR1
6.2L LS9 Supercharged
- 2009 Corvette ZR1
- 2010 Corvette ZR1
- 2011 Corvette ZR1
- 2012 Corvette ZR1
- 2013 Corvette ZR1
Important Engine Identification
The correct factory engine applications are:
- C6 Z06 = 7.0L LS7
- C6 ZR1 = 6.2L LS9 Supercharged
Kooks' current product page incorrectly reverses the LS7/LS9 descriptions in part of its fitment text. The year/model fitment and actual factory engine applications have been verified against independent current product data and are presented correctly above.
IMPORTANT APPLICATION NOTES AND EXCLUSIONS
Connects to OEM Mid-Section
The 21606750 is designed to connect to the OEM mid-section. It can also be used with a compatible Kooks headers and X-pipe combination.
Valved Design
This is a valved axle-back system. The exhaust valves allow the exhaust character to be changed depending on valve position and vehicle operating conditions.
Carbon Fiber Tips
The system includes four 3" carbon fiber exhaust tips. Current retailer specifications identify the tips as round, beveled, double-wall tips.
Not a Complete Exhaust System
This is an axle-back assembly, not a complete header-back or cat-back exhaust system.
Catalytic Converters
Catalytic converters are not included with this axle-back system.
Do Not Confuse With 21606300
Kooks also offers a 2-1/2" axle-back with stainless tips, part number 21606300. The 21606750 is the 3" valved shotgun-style system with carbon fiber tips.
INSTALLATION NOTES
- Verify the vehicle is a C6 Z06 or ZR1 before ordering.
- Confirm the existing mid-section is compatible with the 3" axle-back connection.
- If using Kooks headers and an X-pipe, verify the complete exhaust configuration before ordering.
- Follow current Kooks installation instructions.
- Verify exhaust hanger alignment before final tightening.
- Check exhaust clearance around the rear body, suspension and surrounding components.
- Verify carbon fiber tip positioning before final tightening.
- Inspect all exhaust connections for leaks after installation.
- Recheck fasteners and connections after the initial heat cycle.
- Verify valve operation after installation.
FREQUENTLY ASKED QUESTIONS
What Corvettes does Kooks 21606750 fit?
The system is designed for 2006-2013 C6 Corvette Z06 and 2009-2013 C6 Corvette ZR1 applications.
What engine does the C6 Z06 have?
The C6 Z06 uses the 7.0L LS7.
What engine does the C6 ZR1 have?
The C6 ZR1 uses the 6.2L LS9 supercharged engine.
What size is the axle-back?
The system uses 3" exhaust tubing.
What type of exhaust tips are included?
The system includes four 3" carbon fiber tips with a round, beveled, double-wall design.
Is the exhaust valved?
Yes. The 21606750 is a valved shotgun-style axle-back exhaust.
Does it connect to the factory exhaust?
Yes. Kooks specifies that it connects to the OEM mid-section. It can also connect to a compatible Kooks headers and X-pipe setup.
Does it require Kooks headers?
No, not necessarily. Kooks specifically states that the axle-back can connect to the OEM mid-section or Kooks headers and X-pipe.
Are catalytic converters included?
No. This is an axle-back system and does not include catalytic converters.
What is the difference between 21606750 and 21606300?
21606750 is the 3" valved axle-back with carbon fiber tips. Kooks 21606300 is a 2-1/2" axle-back with stainless steel tips.
Is the system built to order?
Yes. Kooks currently lists 21606750 as built to order in North Carolina with an estimated 4-6 week ship window.
***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.***
