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Keep the side pipes that make your Boss 302 special
The Boss 302 side exhaust is part of the car's character. These Kooks H-pipes include the connections for the OEM side pipes, letting you complete a long tube header upgrade while retaining that distinctive exhaust arrangement. Choose uncatted Competition Only or Performance-catted pipework.
SKUs: 11413410, 11413510
Made for the Boss side exhaust
Both H-pipes use 3" front tubing and 2-3/4" OEM rear outlets. Ball-and-socket front joints fit Kooks long tube headers, and the side-pipe connections are included.
Clamps and catalyst choice
Front fitting clamps are supplied; the rear connection reuses the OEM clamps, which are not included. Performance SKU 11413510 has 300-cell cats for naturally aspirated engines. Competition Only 11413410 is uncatted.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 11413410 | Cat Type: Comp. Only; Crossover Type: H Pipe; Side Pipe Connections: Yes | Uncatted H-pipe with side-pipe connections; front clamps included, OEM rear clamps reused. | Boss 302 side-exhaust arrangement; OEM rear clamps reused; Uncatted; competition use |
| 11413510 | Cat Type: Performance Cats; Crossover Type: H Pipe; Side Pipe Connections: Yes | 300-cell Performance-catted H-pipe with side-pipe connections; naturally aspirated only; front clamps included, OEM rear clamps reused. | Boss 302 side-exhaust arrangement; OEM rear clamps reused; Naturally aspirated only |
Matching products
For your 2012-2013 Boss 302 5.0, the Mustang 5.0 long tube headers offer the required 3-inch collector joint. Pair this side-pipe H-pipe within that Boss application.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2012-2013 | Ford Mustang Boss 302 | 5.0L V8 | 11413410 | Boss 302 side-exhaust arrangement; OEM rear clamps reused |
| 2012-2013 | Ford Mustang Boss 302 | 5.0L V8 | 11413510 | Boss 302 side-exhaust arrangement; OEM rear clamps reused; Performance cats: naturally aspirated only |
Intended use
11413410, 11413510: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11413410.
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 | 11413410, 11413510 |
| Application | 2012-2013 Mustang Boss 302, 5.0L |
| Material | 16-gauge 304 stainless steel |
| Front / rear diameter | 3" / 2-3/4" OEM |
| Layout | H-pipe with OEM side-pipe connections |
| Clamps | Front clamps included; rear OEM clamps reused, not supplied |
| 11413510 catalyst | 300-cell Performance; naturally aspirated only |
Frequently asked questions
Will I retain the side exhaust?
Yes. Both options include connections for the factory Boss 302 side pipes.
Is this for every 2011-2014 Mustang GT?
These particular SKUs are the 2012-2013 Boss 302 H-pipes with side-exhaust connections.
