Compression Ignition Addict
Join Date: Oct 2011
Location: Chico, California
Thanked 250 Times in 241 Posts
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straight piping the stock exhaust is good.
the downpipe is about 3 inches stock.
i bought my truck with 4 inch pipe after the stock downpipe, i switched to 4 inch all the way and noticed quicker spool up, about 50 degrees lower egts and more boost.
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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.