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BMW Performance exhaust
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12-30-2012, 09:48 AM | #1 |
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BMW Performance exhaust
I have purchased AR design downpipes for my 335xi.
I also have JB4 and dual cones. I am wondering if purchasing a BMW genuine performance exhaust will make a difference other than sound or extra few horses for the money that I might dish out? Thanks |
12-30-2012, 09:56 AM | #2 |
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You already have the key exhaust component with the DP's. BMW exhaust is a very poor buy for a performance increase.
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01-01-2013, 01:05 PM | #6 |
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With catless DPs it will be rather raspy....
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01-01-2013, 01:55 PM | #7 |
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No you will not see a performance gain from the PE, since it still retains the secondary catalytic converters. (unless you cut those out)
Also, general consensus on this forum is that the PE doesn't sound very good with Cat-less downpipes.
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01-01-2013, 02:57 PM | #8 |
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I've heard it with catless dp's and it sounds awesome.
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01-01-2013, 04:48 PM | #10 |
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Sounds like a wannaB fart can.
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01-01-2013, 05:07 PM | #13 |
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People can say it doesn't add any power but it does from 5500k to red line. The car feels like it can breathe better. Obviously the PE doesn't add 20-30 whp but the power difference is noticeable. I didn't buy my PE for the performance though, I bought it for the sound. I bought my DP's for performance. I bought my PE used for $800 off a member on here so as long as you find a good deal I think the PE is well worth it.
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01-01-2013, 06:05 PM | #14 | |
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But its a great exhaust, the exhaust note is great but dont expect much HP. |
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01-01-2013, 07:39 PM | #15 |
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What might one expect if they had stock downpipes with secondaries deleted and the PE?
I've been tempting to just try it and worse case put some resonator inplace.
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01-01-2013, 08:37 PM | #16 | |
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01-01-2013, 10:09 PM | #17 | |
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Also the 335 is pretty much all done in by 6300rpm based on any twin turbo dyno runs I have done or seen. In fact the default JB4 shift light setting is at 6K & is what the development cars are shifted at.
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01-01-2013, 11:15 PM | #18 | |
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Actually my BMW PE replaces the midpipes which contains resonators so its a little more than just a "muffler" system. Guarantee with my mods my exhaust added 10+hp
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01-02-2013, 08:02 AM | #19 | |
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For my E92, I have catless downpipes, stock midpipes with cats deleted and replaced with resonators. I think it sounds "OK" in terms of raspiness, but it sounds mean as F*CK when WOT. Just got my mini USB to 3.5mm adapter for the Go Pro, so i can run an external mic. If anyone is interested in hearing what this combo sounds like i can take some vids, or if you want to see the flames it shoots when I NLS from 4th-5th |
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01-02-2013, 09:00 AM | #20 |
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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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01-02-2013, 09:07 AM | #21 |
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Hp gain with any exhaust is negligible. You already have DPs & JB4 and sound is very subjective as most have posted. I have AR catted DPs with the BMW 335is exhaust...I like the sound. The best sound IMO is Berk (axle & mid) with ARs, but they dont make an exhaust for the 335. GL
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01-02-2013, 09:28 AM | #22 | |
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