Know the landed cost before you order
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Keep the exhaust at 3 inches through your Mustang's rear system
For a Mustang using a Kooks crossover with full 3" outlets, this rear system completes the exhaust in the same diameter. It includes polished oval mufflers and 4" stainless tips, giving you the downstream pipework and rear finish together.
SKU: 11304300
Choose the full-size front connection
11304300 requires a Kooks X-pipe or H-pipe with 3" outlets. It does not connect directly to the OEM front exhaust. That is the main purchase difference from the 2-1/2" OEM-fit cat-back.
Stainless construction with clamps included
The rear system uses mandrel-bent 16-gauge 304 stainless tubing and includes fitting clamps. It covers the 2005-2009 GT and 2007-2009 GT500 applications.
Matching products
If you are retaining the stock front exhaust, the OEM-fit 2-1/2-inch cat-back is the alternative OEM-interface route for the GT / GT500 years.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2005-2009 | Ford Mustang GT | 4.6L V8 | 11304300 | Requires Kooks X/H-pipe with 3" outlets; no direct OEM connection |
| 2007-2009 | Ford Mustang Shelby GT500 | 5.4L V8 | 11304300 | Requires Kooks X/H-pipe with 3" outlets; no direct OEM connection |
| 2007-2008 | Ford Mustang Shelby GT | 4.6L V8 | 11304300 | Requires Kooks X/H-pipe with 3" outlets; no direct OEM connection |
| 2008-2009 | Ford Mustang Bullitt | 4.6L V8 | 11304300 | Requires Kooks X/H-pipe with 3" outlets; no direct OEM connection |
| 2008-2009 | Ford Mustang Shelby GT500KR | 5.4L V8 | 11304300 | Requires Kooks X/H-pipe with 3" outlets; no direct OEM connection |
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 | 11304300 |
| Applications | 2005-2009 Mustang GT 4.6L; 2007-2009 GT500 5.4L |
| Material | 16-gauge 304 stainless steel; mandrel-bent |
| Pipe diameter | 3" |
| Required front route | Kooks X-pipe / H-pipe with 3" outlets; no direct OEM connection |
| Mufflers / tips | Polished stainless oval mufflers; 4" polished tips |
| Fitting parts | Clamps included |
Frequently asked questions
Will it connect to my stock exhaust?
No. It requires the Kooks crossover with a full 3" outlet.
Are the clamps included?
Yes. Fitting clamps are supplied with the rear exhaust.
