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      01-25-2016, 07:53 PM   #8
Jeff@TopGearSolutions
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Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com

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That's only partially true assuming the stock exhaust was at it's limits of flow.

More times then not, the drop in filters free up HP compared to stock paper filters on any car.

Is it noticeable, not to some people.

The real power is upping the boost with a tune.

Then after that you will usually want to cool things off with an intercooler but get the throughput by reducing the biggest restriction, the cat.

In the quest for more power on this car, start with a tune. Easy, simple, relatively good value and obvious gains.
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