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Scooter Scooter is offline
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Join Date: Apr 2003
Location: Planet Earth
Posts: 6,168
I understand there to be a performance difference between the euro pre-muffler and a cat bypass. Again, there has been much debate over this issue; here is an example: Pre-muffler vs bypass pipe

As you can see in my first post, I believe the pre-muffler to produce more gains, purely from the information I have gathered from other much more engine savvy individuals than I, here on Pelican.
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Old 01-21-2004, 11:08 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #29 (permalink)