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.
Keep your factory cats and upgrade the headers
You can give your Coyote a header upgrade while keeping the factory catalytic converters. Kooks Super Street 11401400 is made for the 2011-2014 Mustang GT and 2012-2013 Boss 302 5.0, using 1-7/8-inch 304 stainless primaries.
SKU: 11401400
Connects to the factory catalytic converters
The Super Street design connects to the original cats. Its mandrel-bent primaries meet 3/8-inch laser-cut round-port flanges with the factory bolt pattern, making this a distinct choice from a long-tube system that needs separate front connections.
Header gaskets and bolts included
PY-8025-AL gaskets and SB-B60049 header bolts are supplied. Kooks does not require a tune for fitting these Super Street headers; we still recommend calibration for your header upgrade and complete engine specification.
Tuning for your exhaust upgrade
We recommend tuning with every header installation so the calibration suits your headers, complete exhaust and fuel. For your 2011-2014 GT 5.0, choose our Mustang GT 2011-2014 custom ECU tuning. For a Boss 302, Talk to us to arrange the calibration around your car.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2011-2014 | Ford Mustang GT | 5.0L V8 | 11401400 | GT / Boss 302 5.0L; factory catalytic converters retained |
| 2012-2013 | Ford Mustang Boss 302 | 5.0L V8 | 11401400 | GT / Boss 302 5.0L; factory catalytic converters retained |
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 | 11401400 |
| Application | 2011-2014 Mustang GT / 2012-2013 Boss 302 5.0L |
| Header primary diameter | 1-7/8-inch |
| Header style | Super Street; connects to factory catalytic converters |
| Flanges | 3/8-inch laser-cut; round ports; factory bolt pattern |
| Construction | Mandrel-bent primaries |
| Included fitting parts | PY-8025-AL gaskets and SB-B60049 header bolts |
| Calibration | Tune not required by Kooks; recommended by Hoonies |
| Material | 304 stainless steel |
Frequently asked questions
Can I retain the factory cats?
Yes. 11401400 connects to the factory catalytic converters on the stated Mustang GT / Boss 302 application.
Is a tune compulsory for these headers?
Kooks states that a tune is not required for this Super Street product. We recommend tuning with the header upgrade so the calibration suits your actual engine and exhaust.
