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I deleted my resnator when I installed my new muffler and I can differntly tell I lost some power some good up and go. I was wondering if i reinstalled that res would I gain That power back. Also if I superchargered my car would I have to delete it Agian.
 

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no if anything deleting the resonator would give you slightly more power by freeing up the exaust flow, sounds like you have a different problem, check to make sure there isnt something wrong with the new muffler it might be plugged
 

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2003 540i - M Sport
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i have heard that by deleting the resonator you can lose some low end torque...but you gain back the power on the top end...
 

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i have heard that by deleting the resonator you can lose some low end torque...but you gain back the power on the top end...
True, I've put my resonator off and on and off again, I thought I lost some power, but it actually shifts the power to upper rpm range.
Now I let it off, the car accelerate much faster at above 3000 rpm.
When you supercharge your car, you will likely want to delete the resonator if you use the stock piping.
 
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