Second Hand Ford Mustang Cylinder Head

The sixth-generation Mustang (S550) ran from 2015 to 2023 in the UK, with a facelift in 2018, so a 2019 head and a 2018 head sit either side of that facelift boundary. The engine code is the most reliable guide here — if both cars share the same engine code (found on your V5 or via a VIN check), there is a reasonable chance of compatibility, but whether any ancillary or mounting changes were introduced at the 2018 facelift point is something you should confirm with the breaker against your exact registration before buying.

Both the 2015 and 2017 Mustangs fall within the pre-facelift phase of the sixth-generation S550 (2015–2017), so they share the same generation and production run. Providing the engine codes match — for example, both being the 5.0 V8 or both being the 2.3 EcoBoost four-cylinder — fitment is likely to be much closer than crossing into the post-2018 facelift cars. Always confirm with the breaker using your registration to rule out any mid-run production changes to ancillary items or mountings.

Yes, significantly — the GT uses a 5.0-litre V8 and the EcoBoost uses a 2.3-litre turbocharged four-cylinder, so the cylinder heads are entirely different components and are not interchangeable at all. When sourcing a used head, always match on engine code rather than badge or trim name, as these two variants have nothing in common mechanically at the top end. Supply your engine code to the breaker rather than just the trim level to avoid any confusion.

Trim level on its own does not determine which cylinder head you need; what matters is the engine code. Both the GT and Mach 1 in the UK use the 5.0-litre V8 family, though the Mach 1 featured a higher-specification version of that engine with specific internal differences, so you should still match on the exact engine code rather than assuming any 5.0 head will cross over. Confirm the engine code on your V5 or through a VIN check, and pass that to the breaker rather than relying on the trim name alone.

The S197 generation ran from 2005 to 2014, and the S550 generation began in 2015, and these are distinct platforms with different engine architectures despite some shared badging on powertrains. A cylinder head from an S197 is not a straightforward swap onto an S550, and in practice the two generations should be treated as separate sourcing exercises. Always quote your generation, year, and engine code to the breaker so they can pull the correct head from their stock.

Both the 2021 and 2023 Mustangs are sixth-generation S550 cars, so they share the same broad generation, but confirm the engine codes match via your V5 or a VIN check before proceeding. Minor production changes to ancillary components or mountings can occur within a generation without a formal facelift, so this is something to verify directly with the breaker against both registrations rather than assume as fact. Matching engine code to engine code is the safest starting point for any cylinder head sourcing enquiry.