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  1. Rancher 420 Dyno Results
  2. Power Commander map WARNING
  3. Optimizer & Utility Exhaust
  4. Another Optimizer?
  5. Rancher 420 fouling plugs?
  6. Installing the HMF Optimizer
  7. Optimizer and Pipe
  8. Lost Power with HMF Utility and Optimizer
  9. Optimizer trouble
  10. optizimer settings?
  11. rancher 420 with stock exhaust.
  12. My Utility Series in Bad
  13. Swamp Series for 2009 Rancher 420 AT
  14. tunning for accel and tires
  15. Do I need an Optimizer to use an HMF Exhaust?
  16. HMF penland or utility?
  17. New pipe and optimizer?
  18. HMF Exhaust with Quite core
  19. everything is installed! now to tune.