I'd recommend to enjoy leather seats in your Lexus or Cadillac, but keep your Mustang this way.
Leather seats are not for track use. It will make your butt slip out of your seat much easier. Plus, they add weight to your car.
2014 Mustang 3.7L cyclone engine with 6 spd transmission. Mods: 93 MPT Race Tune, 3.31 Gears, Airaid CAI, BBK Shorty Ceramic Headers, Corsa Sport axle backs, Strut Tower Brace, Steeda rear seat X-brace, BMR Rear LCAs, GT wheels, MGW race spec shifter, Passenger seat delete, spare tire delete, Moroso battery relocation to the trunk.