Originally posted by Exclusivs
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Come to think of it, the design of the original E46 CSL Airbox Race version that the Evolve airbox is based on was designed for a racecar that did not need to idle in traffic or meet a sound dB restriction, hence no flap, and the entire unfiltered section is lighter in carbon to save weight versus having the large, plastic CSL control unit/snorkel.
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