The optional S/R package adds stiffer suspension parts (Eibach springs (M-5560-Z2), Tokico struts (M-18000-Z2) and Energy Suspension brand polyurethane suspension bushings), more power (through a Ford Racing PCM (M-12650-Z2)), more efficient intake (Roush or Iceman), rear disc brakes (M-2300-Z2), a stronger clutch (Centerforce dual friction M-7560-Z2), a short-throw B&M manual-transmission shifter (M-7210-Z2), an S/R-unique shift knob (M-7213-Z2) and boot (M-7277-Z2), upgraded seats, a unique blue valve cover, a different speed cluster that goes up to 150 mph and a unique tire/wheel package.