Ordered my Dynomax cat back exhaust system today off Amazon. The only mod I'm sure I want to do! I may also order K&N 63 Series and Jet Chip Stage 2. After reading all topics related to these who know what the results will be though. I will install one at a time a log MPG and see what else changes. If anyone has used K&N 63 Series or Jet Chip gimme a price! Excited for these mods and will post results! Till then, cheers.