S550 Platform · 2015-2023
Ford Mustang S550
Four different engines on one chassis. Suspension, brakes and aero cross the whole platform; engine parts do not. Every listing states which motor it fits.
- 1,557Parts in stock
- 6Trims covered
- 9Model years
- 14+Years building S550s
- Authorized dealer
- Fitment confirmed before you order
- Thousand Oaks, CA install shop
Start here
Shop by category
Every part filed against the S550 chassis, counted live. Not sure which trim you have? The engine guide is just below.
Check your engine
Which engine do you have?
Trim is a filter, not a separate catalogue. Chassis parts fit the whole platform, so the engine decides whether an intake, exhaust or tune carries over.
- 2015-2023 EcoBoost A downpipe and a tune are the two biggest gains on the stock turbo. Engine 2.3L turbo I4 Output 310 hp
- 2015-2023 GT Exhaust and headers first, then forced induction on a stock bottom end. Engine 5.0L Coyote V8 Output 435-460 hp
- 2019-2020 Bullitt GT hardware with the open-air intake and the Shelby intake manifold. Engine 5.0L Coyote V8 Output 480 hp
- 2021-2023 Mach 1 Borrows GT350 cooling and aero, so some GT350 parts fit where GT parts do not. Engine 5.0L Coyote V8 Output 480 hp
- 2015-2020 GT350 Its own engine catalogue on a shared chassis. Chassis parts still cross over. Engine 5.2L Voodoo flat-plane V8 Output 526 hp
- 2020-2022 GT500 Pulley, high-flow lid and a tune before anything else is worth doing. Engine 5.2L Predator supercharged V8 Output 760 hp
Where owners start
Popular S550 modifications
Whether you are adding 30 hp or 300, these are the categories S550 owners upgrade first.
- Exhaust & headers Axle-backs, cat-backs, long-tube headers and downpipes. The EcoBoost downpipe is the single biggest restriction you can remove. Borla, MBRP, Kooks, Corsa, SPE Motorsport
- Forced induction Superchargers for the Coyote, bolt-on turbo upgrades for the 2.3T, and pulleys and lids for the Predator. Whipple, Roush, Precision, Full-Race, Edelbrock
- Suspension Coilovers, lowering springs, sway bars and subframe bracing. The S550 was the first IRS Mustang, so the catalogue is deep. Steeda, KW, BC Racing, BMR, Aldan
- Carbon fiber aero Splitters, side skirts, rear wings, diffusers and hoods. GT350 and GT500 style aero fits across the platform. Anderson Composites, APR, ZL1 Addons, Verus
- Intakes & cooling Cold air intakes, intercoolers, radiators and oil coolers. Heat soak is the EcoBoost limiter before power is. aFe Power, Mishimoto, CV Fabrication, JLT
- Brakes & wheels Big brake kits, two-piece rotors, pads and lightweight wheels. Where the GT350 and GT500 gain the most. AP Racing, Steeda, PowerStop
Authorized dealer
The brands we stock for the S550
Why the S550 Is the Most Modified Mustang Ever Built
The 2015-2023 S550 is the generation that brought independent rear suspension to the Mustang, and it changed what the car could be asked to do. Across nine model years Ford put four genuinely different engines on the same chassis: the 2.3L EcoBoost turbo four, the 5.0L Coyote V8 in the GT, Bullitt and Mach 1, the 5.2L flat-plane-crank Voodoo in the GT350, and the supercharged 5.2L Predator in the GT500. Because they share a platform, the suspension, brake, chassis and aero catalogue is enormous and largely interchangeable, while the engine parts are specific to your motor.
That is why this page covers the whole platform instead of splitting it by trim. A set of Steeda coilovers, a BMR subframe brace or an Anderson Composites splitter does not care whether there is a turbo four or a supercharged V8 in front of it. Use the trim and year filters to narrow down when a part is engine-specific, and call 805-267-9762 if you want it confirmed before you buy.
S550 Mustang Build Guide: Where to Start
Stage 1: First Mods ($500–$1,500)
EcoBoost 2.3T: a cold air intake (Airaid, Injen, Mishimoto), an intercooler upgrade from CVF or Mishimoto to kill heat soak, and a COBB Accessport tune, together 30-50+ whp. GT 5.0 Coyote: an axle-back or cat-back from Borla or Corsa for the sound, a JLT or Steeda intake, and a tune; the Coyote responds modestly to bolt-ons alone, so most GT owners spend here on exhaust note and handling first. GT350 / GT500: start with tires, pads and fluid, because both cars leave the factory with more engine than most drivers use, and the first real gain is in stopping and cornering.
Stage 2: Serious Power ($1,500–$4,000)
EcoBoost: a 3-inch downpipe from CVF or CP-E is the single biggest restriction removed, then a full cat-back and E30 flex fuel with a proper tune, giving 320-380 whp on the stock turbo. GT: long-tube headers and an off-road or high-flow mid-pipe, a ported throttle body and intake manifold, plus a custom tune; this is also where most GT owners add coilovers and a bigger front brake package. GT500: a smaller supercharger pulley, a high-flow lid and a custom tune reliably add 60-100+ whp on the factory Predator blower.
Stage 3: Full Build ($4,000–$10,000+)
EcoBoost: a bolt-on turbo upgrade such as the Precision NX2 or a Full Race kit supports 400-500+ whp with injectors, a high-pressure fuel pump and a race intercooler behind it. GT: a Whipple, Roush or Edelbrock supercharger takes a stock-bottom-end Coyote to 700-800+ whp with supporting fuel. GT350: headers, tune and aero, then a built bottom end if you are going forced induction on the Voodoo. GT500: an upgraded blower or larger heat exchanger, fuel system and a race tune push past 800 whp. Whatever the engine, coilovers from KW, BC Racing or Steeda, a big brake kit, and carbon aero from Anderson Composites or RW Carbon are what turn power into lap time.
S550 Mustang Parts by Category
| Category | What It Includes | Top Brands | HP Impact |
|---|---|---|---|
| Forced Induction | Superchargers, turbo kits, pulleys, BOV, wastegates | Whipple, Roush, Edelbrock, Precision, Full Race, Turbosmart | +100-200 whp |
| Exhaust Systems | Downpipes, cat-backs, axle-backs, Y-pipes | CVF, Tomei, Borla, MBRP | +15-40 whp |
| Cold Air Intakes | Full intakes, intake tubes, filters | Airaid, Injen, Mishimoto, JLT | +10-20 whp |
| Cooling & Intercoolers | Intercoolers, radiators, oil coolers | CVF, Mishimoto, ETS | Prevents heat soak |
| Engine & Tuning | Tuners, spark plugs, catch cans, fuel | COBB, UPR, NGK, Stratified | +30-80 whp |
| Suspension | Coilovers, springs, sway bars, strut braces | KW, Steeda, BC Racing, BMR | Handling |
| Exterior & Aero | Splitters, spoilers, diffusers, body kits | Anderson Composites, RW Carbon, LVA, ZL1 Addons | Aero & looks |
| Brakes | Big brake kits, rotors, pads, lines | AP Racing, Steeda, PowerStop | Stopping power |
Why Choose Function Factory Performance
Function Factory Performance is not just an online parts store: we are a hands-on performance shop that builds and installs every type of product we sell. Our Thousand Oaks, California facility has been building S550 Mustangs since the platform launched in 2015: EcoBoost, GT, GT350 and GT500. We created the original GT Killer Kit that became one of the most popular EcoBoost build packages in the country, and we run a Shelby GT500 of our own on track. Every part in our catalog is something we've tested, installed, and trust on our own builds. When you call 805-267-9762, you're talking to someone who has actually turned wrenches on these cars, not a call center reading a script.
