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      01-02-2013, 11:00 AM   #20
BEAR-AvHistory
2018 440M-Sport MPPSK/THP
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Drives: 2018 440M-Sport MPPSK/THP
Join Date: Jun 2011
Location: NC - USA

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Here is what BMW says:

"The BMW Performance exhaust system invigorates engine output by allowing engine by-products to exit the vehicle more efficiently. RPM performance is heightened and engine performance is increased by up to 5hp and 3 ft-lbs"

Key words are UP TO which suggests best case. Since BMW posts all it power numbers at the crank not the wheel the exhaust does not do squat for performance but it does sound good.

Anyone who believes BMW is in error with their numbers should post before & after dyno runs.
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Kevin

2018 440M-Sport MPPSK/THP - 2017 CX-5 - 2016 Genesis R-Spec Coupe - 2013 135is Cab 6MT/JB4 - 2009 V-Star - 2009 Expedition 4X4 - 1998 Ranger 4X4 - 1965 Cobra MK-IV Dyno Tuned 477WHP - First Start.