Generation study
Ford Mustang GT S550
(2015–2020)
First IRS Mustang.
Ford Mustang GT S550
Why it qualifies
First IRS Mustang. Coyote 5.0 V8 (435-460 hp), 6-speed manual, GT Performance Package adds 6-piston Brembos, K-brace, 3.73 rear. Bullitt (2019-2020) is a future collector — 480 hp, white-cue ball shifter, no badging.
Watch out for
- Coyote oil consumption (TSB on early models)
- Bullitt authenticity check via VIN
- Tracked examples (Performance Pack II tires)
Market trend
→ STABLE
· PRICE BAND mid
Active S550 listings
