Ford Mustang GT S550

HPDE Overview

The S550 Mustang is the first Mustang with a fully independent rear suspension, and it transforms the car from a straight-line brawler into a legitimate track weapon. The 5.0L Coyote V8 produces 435-480 hp depending on year, which is massive power for a street car. Combined with the IRS and available MagneRide dampers, the S550 GT is shockingly capable on track. The Performance Pack (PP1) and Performance Pack 2 (PP2) models are the ones to buy for track use. PP1 adds Brembo brakes, stiffer springs, a Torsen LSD, and larger radiator. PP2 adds MagneRide adaptive dampers, even stiffer springs, a larger rear sway bar, and wider wheels. The PP2 is essentially a turn-key track car. The challenge is managing the massive power and weight. At nearly 3,800 lbs, the S550 puts enormous stress on brakes and tires. The stock brake system, even with Brembos, will fade after 4-5 aggressive laps at demanding tracks. Upgraded cooling and brake ducting are essential. The MT82 transmission in non-PP2 cars is notoriously weak — the Tremec 3160 in PP2 and Mach 1 models is the solution.

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Weaknesses