Compression Ignition Addict
Join Date: Oct 2011
Location: Chico, California
Thanked 244 Times in 235 Posts
Mentioned: 8 Post(s)
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the foil is just their for noise purposes
it cuts down on some of the turbo whine/whistle so you dont hear it in the cab.
doesnt affect egts.
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99.5 f250 7.3 4x4 261k FF 160/30, PHP Hydra, S&B CAI, 4" TBE, Van Turbo with Turbo Blanket, RR Billet Wheel, Autometer Gauges, Transgo Tugger, Non-Ebpv Pedestal, 08 Tow Mirrors, Trucool.
Dad-2000 F250 7.3 4x4 111k Autometer Gauges, Superchips 1705 (Tow Safe), 6637, 4" TBE, BD Billet Wheel, Trucool.