The Termi cans have removeable DB killers so by popping them out they should flow a bit better which I assume is why there is a different chip. They are just slip ons though and still use the stock header and mids so the cat and exup ect... is still there. As of now the only true way to have a straight through flow path is the DP termi 2-1..... until ARC or maybe some of the other after market outfits come out with a full system maybe?
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Mike B.
06 800 SS
08 HM 1100S
89 KLR 650
87 Paso 750
64 125 Bronco
A few Chinese dirt bikes 
Ect.....
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