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      01-02-2010, 10:59 AM   #6
R1000K3
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Drives: 335i MT
Join Date: Jul 2009
Location: USA

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Quote:
Originally Posted by AndreM818 View Post
Hey,

I recently deleted my mufflers and a friend of mine today said that because of it I was going to lose some horsepower because of the backpressure or something. Can anyone tell me if this is true or not?

Thanks.
The power will increase both on N/A and turbo engines when the exhaust system is opended after the collector. N/A engines are more sensitive on header design though. Long and thin pipes is good for low end power and provides a crisp throttle response from idle to midrange. Large and shorter ones is needed for high power on high rpm's.
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