I put a replacement K&N panel filter. Sounded a little louder and the pull was good too.
Oh yeah, V6 owners surely drive with windows down, The sound is heavenly! Especially at 6500 rpm with sound bouncing of the walls. Simply heavenly! I love it, I absolutely love it even after 6 years with the car never ever tired with that zing!
BTW, has anyone measure the 6 intake runner sizes? Are they 38mm like the 164 V6s? I was thinking of putting in a 164 QV AFM, 164 intake runners (if bigger and if they fit). The 164 QV AFM is big, so if it's too big, I'll have to fabricate restrictor plates. I think the optimal size is somehwere between the stock AFM size and the QV AFM size.