I read a lot about this when I was looking into an intake upgrade and learned that the deck-plate mod and the Intake Silencer Removal (ISR) performed just about as well as anything out there and it only costs about $20 and about an hour of your time.

~Dave

'98 4Runner SR5, 3.4L, 5-Speed, 4WD >>K&N, ISR, TRD Clutch, 265/75R16 Yokohoma Geolandar AT+II's, OME (880/N91SC, 906/N86C)>> SOLD to pay bills.