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      10-31-2008, 02:06 PM   #95
Evolution Racewerks
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Drives: E90 N54 | F30 N20 | F10 N55
Join Date: Feb 2008
Location: Baldwin Park, CA

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That's assuming that the pistons aren't steel in our 135i. We don't know that yet as nobody has found out whether they're steel or aluminum.

Originally Posted by cuizhuoyi01 View Post
evos' owner never had problem with caliper piston.maybe because the piston is steel.
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