Look the Flowmaster web page it says on the 40 series mufflers they have single and triple baffle mufflers in the 40 series. If you click on the Delta Flow sign on that page it says that they put the delta flow in their 40 and 50 series mufflers. The 40 series is the 2 chamber muffler. I was origanally tring to find out why the American Thunder, supposivaly the loudest, has the Delta Flow techanology.
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Steve Stumbaugh
89 LX 5.0 5sp.
Removed air silencer
Motorcraft 8mm wires
Autolite platinum plugs
BBK O/R h-pipe
[This message has been edited by stevstum (edited 10-05-2001).]
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