How to make a U.S Spec 450SEL 6.9 to R.O.W Spec performance

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Oct 29, 2014 | 03:57 AM
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Hello,


A friend of mine recently got a U.S Spec 450 SEL 6.9 and was wondering if he can get it up to the power of the ROW spec 6.9's.

What is involved ?
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