I got a TRD filter and IMO it SUCKS! You hear nothing different and you feel no difference..well i guess you sorta do, to me it felt a little smoother at some time. Getting ready to order a short-ram though. Why can't you get an Intake?
when talking about such small power increments (1 or 2 whp) you can't 'feel' anything different, even though there is a very slight difference.
if you do 'feel' a difference..it's due to driver bias (you know you have a power mod, therefore you 'feel' the extra power, even though it's impossible to).