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Old 12-10-2012, 08:08 AM   #94374
klodkrawler05
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Quote:
Originally Posted by kylesvt720 View Post
What kind of money would it cost to make decent hp with the base Z4? Probably have to buy used, it looked like a header for the base 3.0 is $2,400 new?
the base Z4 is the same motor I have. Most guys recommend doing eBay headers since the performance difference between the big money one's isnt worth it.

the MB54B30 motor just doesn't respond well to whats available and unlike the e36 where M3 motor parts work on non M motors you're stuck with z4/330ci specific parts which have a very small aftermarket because most performance people go with the M right off the bat.

the Z4 3.0si would be a little extra power from a more efficient manifold and IIRC hotter cams but at best your going to add 10-15hp with NA mods like tuning/headers/exhaust/intake to the non M

cams will add another 15-20 if you're willing to take that step. but by then you'd have I'd guess at least $4500 into the engine and still be far behind a z4m.........although you could supercharger it with the leftover $550...
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