Yes The Hushpower works as claimed and is worth the $$$ in my opinion. It did exactly what i wanted it to, Take the edge off but leave a good sound.
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433 Hp 835 Tq - 2007 6.7 TWIN TURBO 2500 Bighorn 4x4 6-spd Manual, Airdog 150, ARP Head Studs, "HOT" Edge Jw/A, TS MP-8, Airbags with Dual Control Air Comp., H&S Delete & Downpipe, What EGR?, Valair Dual Disk, Amsoil Bmk-11 Bypass, 295/70/R17 Toyos on Walker Evans Wheels,6" Aussies & Hushpower Muffler & DiProcol Gauges Thanks to Wally At FTEDiesel!!!!!