Is there really that much difference between the street/performance tune either with regular 87 or Cali's crappy 91? I know the CAi +tune is a good idea! Street V performance tune???????
little more timing so therefore a little more hp. if you want the most out of your stang use 93 tune. the motor can handle it no prob. only - is cost of gas. premium usually 20 to 30 cents higher or about 2 or 3 $ a tank.