Compression Ignition Addict
Join Date: Feb 2006
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I have the Whisper mode, and it quiets the truck down a bit, but not as much as DP Tuner's.
I had a DP Tuner chip with their drive-thru mode and it almost made the truck silent. Very nice, BUT with the obnoxious gases that came out the tail pipe I had to keep the windows closed or my eyes would water. It was that bad. I could fill up the entire bank parking lot with smoke in the winter time, and the other people at the drive-ups would always give me bad looks.
Bill's isn't that bad with the gasses, and isn't as quiet, but it does help a lot.