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A header upgrade made for your right-hand-drive Mustang
Make more of your Mustang GT V8 with long tube headers designed for the right-hand-drive installation. Kooks 11552400 uses 1-7/8-inch 304 stainless primaries and 3-inch collectors, with the header fitting parts included.
SKU: 11552400
The right fit for your GT
These headers are for 2015-2026 right-hand-drive Mustang GT 5.0 applications. Gaskets, header bolts and O2 extensions are supplied. Fit them with the matching Kooks connection pipes, then choose the crossover and rear exhaust connections that suit your car.
Keep the rear exhaust you like
A suitable OEM-size rear exhaust can be retained using the appropriate separate adapters, or a matching Kooks crossover that supplies its own adapters and clamps. We can help you choose one complete combination so you buy the parts you actually need.
Tuning for your exhaust upgrade
We recommend tuning with every header installation so the calibration suits your headers, complete exhaust and fuel. For a 2015-2017 GT 5.0, choose our Mustang GT 2015-2017 custom ECU tuning. For 2018-2026 cars, Talk to us about calibration for your exact year and exhaust.
Matching products
The Mustang Competition connection pipes are the uncatted front-pipe option for these 2015-2026 RHD GT 5.0 headers; select the corresponding GT 5.0 SKU. To connect matching front pipes to the OEM-size rear exhaust on a 2015-2026 GT 5.0, use the GT 5.0 OEM connection adapters; this is a pair, with clamps purchased separately. For the same 2015-2026 GT 5.0 header-and-connection installation, the ULTRA X-pipe supplies its own mid-pipe adapters and clamps, offering an alternative to buying the separate adapters.
Vehicle fitment
| Years | Vehicle / trim | Engine | Applicable SKU | Fitting conditions |
|---|---|---|---|---|
| 2015-2026 | Ford Mustang GT | 5.0L V8 | 11552400 | Right-hand drive GT 5.0 only; matching Kooks connections |
| 2015-2026 | Ford Mustang GT Premium | 5.0L V8 | 11552400 | Right-hand drive GT 5.0 only; matching Kooks connections |
Intended use
11552400: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 11552400.
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 | 11552400 |
| Application | 2015-2026 Mustang GT 5.0L; right-hand drive only |
| Header primary diameter | 1-7/8-inch |
| Collector diameter | 3-inch |
| Included | Gaskets, header bolts and O2 extensions |
| Required exhaust parts | Matching Kooks connection pipes |
| Material | 304 stainless steel |
Frequently asked questions
Will these fit my left-hand-drive Mustang?
11552400 is specifically the right-hand-drive header. Choose the appropriate left-hand-drive product for an LHD car.
What comes with the headers?
The gaskets, header bolts and O2 extensions are included. Connection pipes and any separate rear-exhaust adapters are additional purchases.
