70 series flowmasters?
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Senior User
Joined: Jan 2008
Posts: 154
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From: Greenwood Indiana
70 series flowmasters?
I am thinking about adding these to my 99 Expy, anyone done this yet, and if so how loud are they, dont want a lot of resenating in the cab, but want it to breath easier with 3 inch from cats back, any help would be appreaciated
Junior User
Joined: Feb 2006
Posts: 84
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From: Ontario
I had 70 series flowmasters 2-1/2" on my truck they weren't loud at all inside the truck, I found them actually too quiet for me. Can't imagine a 3" set up would be too loud, my flowmaster Hushpower II's don't really resonate unless your cruising at 2500-2600 rpms.
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