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Old 09-26-2013, 05:00 PM   #17
swiftkart
 
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Drives: 2010 SS/RS LS3 M6
Join Date: Apr 2011
Location: Kansas
Posts: 693
About 4,000 miles on my Mantic 9000 twin now, pure butter and very smooth, holding my 700+rwhp with no problem, feels better than stock to me and it's about 27 lbs lighter by my scale.
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