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      09-10-2012, 04:11 AM   #134
Gunzaro
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Cyprus
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Drives: Speed Racer
Join Date: Jan 2011
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Yeah I agree, there is not a huge amount of difference since the stock IS/1M engine is well tuned from factory. In fact some guys did dyno testing on a 1M and ESS and found only a small difference.

Only way to tell for sure is to do a before/after dyno.
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