K&N anything smaller is a restriction, even on mildly modified, Turbo Regals.This air filter is available in 3″ and 4″ inlets to match our 3″ or 4″ MAF pipes.
#K-14-3 3″ inlet -9″lg $89
#K-14-4 4″ inlet 14″lg $109
MAF / Up Pipes / Air Filters / Hoses & Clamps
Shown on the right: 4 Inch MAF
