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  1. Favorite Mazda3 mod
  2. Cobb Exhaust for the MS3?
  3. MS3 and MPG
  4. Balance shaft delete on speed 3, worth it?
  5. My 3 on a Mustang Dyno
  6. tuning
  7. Front mount intercooler - next mod - Which one?
  8. Cat back for 2011 speed3 - ?
  9. review questions on two shops ???