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      08-13-2012, 10:24 AM   #7
GaryS
Colonel
24

 
Drives: 2009 135i 6MT
Join Date: Feb 2010
Location: Maryland


Posts: 2,089
iTrader: (0)

Garage List
2009 135i  [3.25]
Afaik no one has ever done a comparison test. HPF is the shiniest, AA has a cool Darth Vader look, Helix is really big, ETS is drop-in, Dinan has the least pressure drop (or did at one point).