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H2 Exhaust Systems
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12-09-2002, 02:50 PM
Big Z
Hummer Authority
Join Date: Nov 2002
Location: Wherever I Go, There I Am!
Posts: 1,216
I've had the xtreame exhaust & cold air intake installed for about a month now. I have not gained better MPG, but have noticed better performance. Sounds very good also!
Big Z
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