Join Date: Oct 2013
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When I got my truck I wondered how the engine got any air at all to breathe. I came across the zoodad and it seemed like a no-brainer. I did it, and noticed absolutely no difference. I then came across the 6635 mod, and did that as well. I noticed absolutely no difference. The 6635 is way bigger, and with a hole in the rad support, the engine MUST be getting more air. I just didn't notice any more power or MPGs. I'd still recommend doing it...it doesn't hurt anything at all. I have a 4" straight exhaust which was installed before the zoodad and 6635
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2000 F250 Super Duty, 4x4, 7.3, 6 speed manual, 4" straight exhaust, 6637 air filter, superwinch hub locks, zoodad, foil delete, AIH delete, power pedal, autometer gauges, 2.5" leveling kit, 260,000