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Old 07-27-2008, 06:23 PM   #1
2005M3Driver
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VF kit installed with Exhaust

I just recently had the VF stage II supercharger installed along with custom headers and a full Magnaflow catback exhaust. But car is way too loud, any advice on how to quiet down the car or what should I have done different?
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Old 07-27-2008, 06:26 PM   #2
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not sure about quieting it down but i think the excess noise is from the headers
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Old 07-27-2008, 06:47 PM   #3
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I just recently had the VF stage II supercharger installed along with custom headers and a full Magnaflow catback exhaust. But car is way too loud, any advice on how to quiet down the car or what should I have done different?
Without cats it's gonna be loud. I've always ran Euro cats and have faired better than other VF cars that ran catless. In fact Fanatic7's VF stage 2 ran faster with cats than without.
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10.81 @ 135.12 MPH
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Old 07-27-2008, 09:38 PM   #4
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Buy couple resonators from Summit and have them welded in.
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Old 07-28-2008, 09:13 AM   #5
2005M3Driver
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Will I feel any power lose if I put back the factory exhaust and just put on high flow cats?
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Old 07-28-2008, 09:35 AM   #6
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Will I feel any power lose if I put back the factory exhaust and just put on high flow cats?
NO!!!!! You will be perfectly fine with that setup.
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2008 E92 M3 DCT
Bolt Ons 60-130 MPH 10.71s
11.88 @ 118MPH
ESS VT625+ SC 60-130 MPH 6.8s
11.30 @ 129.3 MPH
ESS VT725 SC 60-130 MPH 6.4s
10.81 @ 135.12 MPH
SS3 1/2 Mile Trap 174.12 MPH

Previous
VFE Stage 2 E46 M3 Best ET 11.51 @ 122MPH
60-130MPH 8.67s
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Old 07-28-2008, 11:09 AM   #7
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No doubt, headers and free-flowing exhaust is loud. I wouldn't put the stock headers back on, but there are a lot of things you can do to quiet the exhaust. A quieter muffler with resonators or aftermarket catalytic converters will do a lot to help and would be my first step.
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Old 07-28-2008, 12:54 PM   #8
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I'd go with euro or SS cats with stock section 2 and rear muffler.
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Old 07-28-2008, 09:45 PM   #9
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I think I am going to keep the magnaflow section 2 and just rig up the stock muffler to hook up to the magnaflow section 2.
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Old 07-29-2008, 07:47 AM   #10
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Good luck. That's going to be alot of work...
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