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The aFe Takeda Magnum FORCE Stage 2 is a cold air intake kit for the 2011–2016 GM Duramax 6.6L diesel. It replaces the factory airbox with an open-element housing and a large 360-degree radial filter, feeding a wide intake tube. aFe claims dyno gains up to +17 hp and +37 lb-ft and 36% more flow than stock. It suits owners who want more turbo and intake sound plus a modest power bump and are willing to accept more intake noise and a dry or oiled filter to maintain.
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Lowest price we've seen: $334.38 on Nov 13 at Amazon; highest $434.97 on Oct 31. Tracked across 10 stores since Oct 31.
Owners of Duramax trucks report a clear jump in turbo and induction sound and a modestly sharper throttle, and most find the install straightforward. Some question how much of the claimed power shows up in real driving and note the extra noise and filter upkeep.
This is a Stage 2 cold air intake from aFe. It uses large-diameter intake piping and an open-element filter housing. The open design is meant to maximize airflow and give the engine a more aggressive intake sound.
The piping is either mandrel-bent aluminum or molded XLPE polymer, which resists heat soak. The filter is a 360-degree radial design that maximizes surface area.
