View Single Post
Old 05-29-2012, 05:38 AM   #8
Registered User
Join Date: Feb 2008
Location: Mountain Top
Posts: 6,459
My Ride: 2005 M3 Coupe
Not surprised. I would imagine the intake manifold and/or the head itself are larger bottlenecks in most cars. The only car I've seen a filter make a big increase was the mazdaspeed 3
TerraPhantm is offline   Reply With Quote