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Hey, I agree it's pretty hard to find data on the Harrop. I am very happy with mine. Here is my dynapack chart from Harrop in Melbourne with a stock exhaust.[IMG][/IMG]
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2009 e90 M3 Harrop s/c
2006 golf GTI stage 1
2018 Triumph Street triple RS
1999 e36 M3 convertible-sold
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