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  • Donating Members
  • Member For: 13y 8m
  • Gender: Male
  • Location: Gold Coast

hey all

quick question, when I had my tune a few months back was told my rear muffler was restricting more power, 4in dump and single 3 1/2in xforce stainless system. must be the first series xforce rear muffler.

my plan is to just remove the rear muffler all together and fit up a peice of 3 1/2in pipe to put in its place,

will I need a re-tune?

cheers in advance

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https://www.fordxr6turbo.com/forum/topic/84369-will-i-need-a-re-tune/
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  • Donating Members
  • Member For: 17y 1m 19d
  • Gender: Male
  • Location: Vic

Yes. May as well do more mods at the same time.

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  • 2 weeks later...
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  • Donating Members
  • Member For: 18y 7m 11d
  • Gender: Male

I recently replaced my rear muffler due to the same problem and I didn't retune

  • I am dissatisfied with my current employment situation
  • Donating Members
  • Member For: 18y 7m 11d
  • Gender: Male

How can you tell the rear muffler was a restriction?

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