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Join Date: Oct 2000
Location: Lincoln, NE
Posts: 15,664
Cat bypass is just a steel tube that replaces the cat converter. A premuffler is what it says, a smaller cylindrical muffler that replaces the cat converter. The muffler is that big banana shaped thing at the back of your car that the cat, bypass tube or premuffler attaches to.
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Kurt V
No more Porsches, but a revolving number of motorcycles.
Old 01-21-2004, 11:07 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #28 (permalink)