I'm being repetitive, but I drove it stock for awhile, then I removed the silencer ring, tried that for awhile, then installed the Blue Hose, Cool Power, and TAG III. There's a substantial increase in smooth acceleration, overall power and lower EGT's to boot! I'm very impressed and wouldn't be without this combination. Also getting 19 mpg when driving around town (never drive on long highway trips w/o towing something heavy). No problems!