3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
cost depends on how much work you can do yourself. a basic IE 3L stroker kit with headwork, and doing most the work yourself, would probably be around $8k. the S50 swap could possibly be in the same range if you do most the work yourself and find a good deal, but would most likely be more
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