I am curious if anyone has any stats on stock sleeves versus aftermarket sleeves. What kinda of gains do you see on say a B18B with 84~84.5mm aftermarket sleeves versus the stock 81~81.5mm sleeves? Is it worth the extra $1200 or so?
not to thread jack but what kind of horsepower range requires a bore and sleeving...like what's the highest horsepower a b18b will support on the stock sleeves
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