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Old 08-09-2013, 12:34 AM   #22
J3SST3R
Scooby Specialist
 
Member#: 298926
Join Date: Oct 2011
Chapter/Region: W. Canada
Location: Calgary, Alberta Canada
Vehicle:
2007 USDM STI
Satin White Pearl

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Probably the square piston design that makes these strokers a knocking b****. and a combination of the lower grade fuel, Meth might help your situation but only to some extent before hitting the same plateau your at currently...
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