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.
Choose the crossover character for your Coyote Mustang
Finish your Kooks header installation with the X-pipe or H-pipe arrangement you prefer. These 3" stainless connections offer Competition Only, Performance or GREEN choices and transition to the 2-3/4" OEM rear exhaust on your 2011-2014 Mustang GT.
SKUs: 11413100, 11413200, 11413300, 11413400, 11413500, 11413600
Choose the crossover and cats together
An X generally favours a smoother, higher-pitched character; an H generally favours a deeper tone. The rear mufflers still shape the result. Performance cats use a 300-cell specification here and suit naturally aspirated engines; GREEN uses 400-cell cats and supports forced induction.
Know which clamps stay on the car
The 16-gauge 304 stainless pipes have ball-and-socket front joints for matching Kooks long tube headers. Front fitting clamps are included. The 2-3/4" rear outlets reuse the OEM clamps, which are not included in the purchase. These choices have no side-pipe connections.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 11413100 | Cat Type: Comp. Only; Crossover Type: X Pipe; Side Pipe Connections: No | Competition Only X-pipe; Front clamps included; rear OEM clamps reused, not included | Uncatted; competition use |
| 11413200 | Cat Type: Performance Cats; Crossover Type: X Pipe; Side Pipe Connections: No | Performance Cats X-pipe; Front clamps included; rear OEM clamps reused, not included | Naturally aspirated only |
| 11413300 | Cat Type: GREEN Cats; Crossover Type: X Pipe; Side Pipe Connections: No | GREEN Cats X-pipe; Front clamps included; rear OEM clamps reused, not included | Use the SKU-specific vehicle rows below |
| 11413400 | Cat Type: Comp. Only; Crossover Type: H Pipe; Side Pipe Connections: No | Competition Only H-pipe; Front clamps included; rear OEM clamps reused, not included | Uncatted; competition use |
| 11413500 | Cat Type: Performance Cats; Crossover Type: H Pipe; Side Pipe Connections: No | Performance Cats H-pipe; Front clamps included; rear OEM clamps reused, not included | Naturally aspirated only |
| 11413600 | Cat Type: GREEN Cats; Crossover Type: H Pipe; Side Pipe Connections: No | GREEN Cats H-pipe; Front clamps included; rear OEM clamps reused, not included | Use the SKU-specific vehicle rows below |
Matching products
The 2011-2014 Mustang GT long tube headers provide the matching 3" front connection for your chosen X-pipe or H-pipe.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2011-2014 | Ford Mustang GT | 5.0L V8 | 11413100, 11413200, 11413300, 11413400, 11413500, 11413600 |
Intended use
11413100, 11413200, 11413400, 11413500: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11413100, 11413400.
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 | 11413100, 11413200, 11413300, 11413400, 11413500, 11413600 |
| Application | 2011-2014 Mustang GT 5.0L V8 |
| Material | 3" 16-gauge 304 stainless steel |
| Header joint | Ball and socket; matching Kooks long tube headers required |
| Crossover choices | X-pipe or H-pipe |
| Catalyst choices | Competition Only; Performance 300 cell; GREEN 400 cell |
| Rear outlet | 2-3/4" OEM |
| Included / reused clamps | Front clamps included; rear OEM clamps reused and not included |
| Side-pipe connections | None on the listed choices |
| Performance condition | Naturally aspirated only |
Frequently asked questions
Are the rear OEM clamps included?
No. The rear connection reuses your OEM clamps. The front fitting clamps are supplied.
Do these include Boss-style side-pipe connections?
The listed options have no side-pipe connections.
Can I choose an H-pipe with GREEN cats?
Yes. 11413600 is the GREEN H-pipe choice.
