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Match the crossover to your Mustang's headers and rear exhaust
Choose the X-pipe that completes your New Edge exhaust, with the collector size, rear outlet and cats your setup needs. This Kooks range includes 2-1/2" and 3" front joints, OEM-size rear outlets and a full 3" Competition Only option.
SKUs: 11203140, 11203150, 11203160, 11203240, 11203250
Choose both ends of the pipe
11203140 / 11203240 use 2-1/2" header inlets and OEM outlets. 11203150 / 11203250 take a 3" header joint to the 2-1/2" OEM rear interface. 11203160 has 3" outlets for a matching rear exhaust and does not join the OEM cat-back.
Cats and fitting clamps
The catted 11203240 / 11203250 use 400-cell Performance cats for naturally aspirated engines. The 112031-series choices are uncatted Competition Only. All five options include fitting clamps and require matching Kooks headers.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 11203140 | Inlet Size: 2-1/2"; Cat Type: Comp. Only; Outlet Size: 2-1/2" (OEM) | Uncatted; 2-1/2" inlet to 2-1/2" OEM outlet; clamps included. | Uncatted; competition use |
| 11203150 | Inlet Size: 3"; Cat Type: Comp. Only; Outlet Size: 2-1/2" (OEM) | Uncatted; 3" inlet to 2-1/2" OEM outlet; clamps included. | Uncatted; competition use |
| 11203160 | Inlet Size: 3"; Cat Type: Comp. Only; Outlet Size: 3" | Uncatted; 3" inlet to full 3" outlet; matching rear exhaust required; clamps included. | Uncatted; competition use |
| 11203240 | Inlet Size: 2-1/2"; Cat Type: Performance Cats; Outlet Size: 2-1/2" (OEM) | 400-cell Performance cats; 2-1/2" inlet / OEM outlet; naturally aspirated only; clamps included. | Naturally aspirated only |
| 11203250 | Inlet Size: 3"; Cat Type: Performance Cats; Outlet Size: 2-1/2" (OEM) | 400-cell Performance cats; 3" inlet to 2-1/2" OEM outlet; naturally aspirated only; clamps included. | Naturally aspirated only |
Matching products
For a 1999-2004 Cobra 4V, the Cobra 4V 3-inch-collector headers match the 3-inch-inlet X-pipe options. The header EGR, SMOG and possible aftermarket steering-shaft conditions still apply.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 1999-2004 | Ford Mustang GT | 4.6L V8 | 11203140, 11203150, 11203160 | |
| 1999-2004 | Ford Mustang GT | 4.6L V8 | 11203240, 11203250 | Performance cats: naturally aspirated only |
| 1999-2004 | Ford Mustang SVT Cobra | 4.6L V8 | 11203140, 11203150, 11203160 | |
| 1999-2004 | Ford Mustang SVT Cobra | 4.6L V8 | 11203240, 11203250 | Performance cats: naturally aspirated only |
| 2001 | Ford Mustang GT Bullitt | 4.6L V8 | 11203140, 11203150, 11203160 | |
| 2001 | Ford Mustang GT Bullitt | 4.6L V8 | 11203240, 11203250 | Performance cats: naturally aspirated only |
| 2003-2004 | Ford Mustang Mach 1 | 4.6L V8 | 11203140, 11203150, 11203160 | |
| 2003-2004 | Ford Mustang Mach 1 | 4.6L V8 | 11203240, 11203250 | Performance cats: naturally aspirated only |
| 2003 | Ford Mustang SVT Cobra 10th Anniversary | 4.6L V8 | 11203140, 11203150, 11203160 | |
| 2003 | Ford Mustang SVT Cobra 10th Anniversary | 4.6L V8 | 11203240, 11203250 | Performance cats: naturally aspirated only |
Intended use
11203140, 11203150, 11203160, 11203240, 11203250: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11203140, 11203150, 11203160.
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 | 11203140, 11203150, 11203160, 11203240, 11203250 |
| Application | Supported 1999-2004 Mustang GT / Cobra 4.6L 2V / 4V |
| Material | 16-gauge 304 stainless steel |
| Header joints | Ball-and-socket; 2-1/2" or 3" by SKU |
| Rear outlets | 2-1/2" OEM, except 11203160 full 3" |
| Performance cats | 400-cell; naturally aspirated only |
| Fitting parts | Clamps included |
Frequently asked questions
Which option needs a full 3-inch rear exhaust?
11203160. Its 3" rear outlets do not join the OEM cat-back.
Do I choose only by the engine?
Match the header collector and rear outlet too. The exact sizes are shown against every SKU.
