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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 07-28-2012, 09:29 PM   #21
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How much did you have to pay for the custom exhaust work?
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Old 07-29-2012, 07:19 PM   #22
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Originally Posted by bigjae1976 View Post
Does it drone? The drone at 2k in my car is quite boomy.
I would say this is the perfect mod for you then. Probably the two biggest things I noticed after doing this is first the rasp at 3-4k RPM is gone, and second the boomy drone between 1k-2k RPM is much reduced. I think I can start the car in the garage now without the entire house knowing it.

EDIT: But I just remembered you changed out the very rear muffler already, so I guess there's no guarantees.

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How much did you have to pay for the custom exhaust work?
We started work at just before 9am and were done by 11am. Spent $100 on the Magnaflow 14386 (same as the 11386 only its polished), and the labor cost me $140.
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Old 07-31-2012, 05:30 PM   #23
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Just got done installing the x pipe muffler in mine as well. You guys that have the 16533 magnaflow system have got to install the 3 rd x pipe muffler. Your bimmer will sound more like a porsch 911 turbo instead of a honda when you do this. I promise you will love it. Thanks rkneeshaw and rob43


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Old 07-31-2012, 07:05 PM   #24
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Any clips Brush? Also do you have headers?
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Old 07-31-2012, 07:49 PM   #25
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Any clips Brush? Also do you have headers?
Yes, I have AA headers. As far as video clip, the op did a video clip and it's hard to hear the difference on video. But trust me, their is a difference for the better.
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Old 07-31-2012, 09:48 PM   #26
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Just got done installing the x pipe muffler in mine as well. You guys that have the 16533 magnaflow system have got to install the 3 rd x pipe muffler. Your bimmer will sound more like a porsch 911 turbo instead of a honda when you do this. I promise you will love it. Thanks rkneeshaw and rob43

Nice, looks right to me! Sounds so good. 5 days in and I'm still loving my windows down and still find my self noticing how much better it sounds. Not nearly as obnoxious as it used to be, just great sound.
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Old 08-02-2012, 12:02 PM   #27
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911 Turbos sound like ass. If what you say is the case I'm out.
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Old 08-02-2012, 05:21 PM   #28
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911 Turbos sound like ass. If what you say is the case I'm out.
It was just an expression, let me more specific for some of you out their. It sounds more like a european race car instead of a tricked out Honda. Their must be a reason that Borla uses 3 mufflers on their exhaust catbacks for or our cars. Cause the magnaflow with only the 2 mufflers is the one that sounds like ass.

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Old 08-03-2012, 07:33 AM   #29
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Cause the magnaflow with only the 2 mufflers is the one that sounds like ass.
I wouldn't go that far. With headers on the car the magnaflow 16533 out of box did have some rasp in the mid RPM's and was a bit loud, but the general tone of the exhaust sounds very good, it just needed to be refined a bit more because of our headers.

Don't let that dude get you riled up, he clearly posted a provocative statement on purpose. I get what you meant by saying it sounded like a 911 turbo, whether it exactly does or not, the exhaust sounds friggin sweet now that this extra muffler was added in. And because the pipe diameter and the xpipe is maintained, performance is the same with no loss.

For those with headers, this exhaust system with this mod should be at the top of their to-do list!
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Old 08-03-2012, 02:32 PM   #30
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Any chance you could get some more videos, inside and outside? In the video I do actually hear some rasp.
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Old 08-04-2012, 10:26 AM   #31
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Maybe if you listen close you can hear a bit of rasp in the first two segments of that video, and that makes sense because that was before I added the muffler. The third and last segment of that video is after the muffler is installed. There's no rasp, it sounds very nice.
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Old 07-15-2015, 02:06 PM   #32
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There is probably another way we can improve this cat-back system, primarily for those of us who have gone with boost.

Some have reported whistling issues with this exhaust, such as this one here from bigjae: http://forum.e46fanatics.com/showthread.php?t=806767

Basically this 16533 system's rear muffler is a dual 2.5" in to a single 2.5" outlet, but shrinks to a single 2.25" pipe before splitting the tips. That essentially makes this a single 2.25" system. For NA cars, that is fine, and I think I proved that with my dyno where I put down 229whp and 225wtq with headers, the 16533, pulleys, tune, and intake. But when you add boost you need more CFM out of the exhaust than a single 2.25" can handle.

Now that I have added the ESS TS2 I have a strange sound above 5500 RPM, it sounds like someone is blowing through a straw and pinching off the end of it. That's the best I can do to describe it. Like a loud pushing of air through a small hole.

Bigjae mentions in a post in the Install Notes thread (http://forum.e46fanatics.com/showthr...=861129&page=5) that swapping the rear muffler did yield a performance (and sound) improvement.

My current plan is to attempt to swap the rear muffler in the 16533 with the Magnaflow 12198 (http://www.magnaflow.com/02product/d...rtnumber=12198). This is a dual 2.5" to single 3" outlet. I'm going to have a local fabricator attempt to graft the split-tip setup onto the larger 3" outlet, and maintain the same area of the single 3" all the way through. According to my calculations, the square area of a single 3" pipe is larger than dual 2.25" pipes, so that should be plenty. The headers are dual 2" pipes, for reference, so as long as we get larger and not smaller we should be good.

I'll add a note that my goals are to achieve the best performance possible at the lowest sound levels. I really don't like loud exhausts. I have a hunch this will make my exhaust slightly louder, but I hope it is minimal and the performance improvements are significant.
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Old 07-15-2015, 02:28 PM   #33
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Originally Posted by rkneeshaw View Post
There is probably another way we can improve this cat-back system.............

My current plan is to attempt to swap the rear muffler in the 16533 with the Magnaflow 12198 (http://www.magnaflow.com/02product/d...rtnumber=12198). This is a dual 2.5" to single 3" outlet. I'm going to have a local fabricator attempt to graft the split-tip setup onto the larger 3" outlet, and maintain the same area of the single 3" all the way through. According to my calculations, the square area of a single 3" pipe is larger than dual 2.25" pipes, so that should be plenty. The headers are dual 2" pipes, for reference, so as long as we get larger and not smaller we should be good.

I'll add a note that my goals are to achieve the best performance possible at the lowest sound levels. I really don't like loud exhausts. I have a hunch this will make my exhaust slightly louder, but I hope it is minimal and the performance improvements are significant.

Here are my thoughts based on Exactly what you said:

Don't use the smaller Magnaflow 12198, use the Larger 12588. The input output are the same, but the larger case of the muffler will yield a quieter decibel rating. Overall fitment should also work well because I still believe that the 12588 is still slightly smaller than the stock OE muffler.

http://www.magnaflow.com/02product/s...=main&id=10381



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Old 07-15-2015, 05:11 PM   #34
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Wish I could Rob but that 22" long body is way too long to fit under there. Not a lot of room length-wise unfortunately. Its possible I might be able to get an 18" muffler body in there, but it would be really tight, and it would have to be a flatter muffler or else the muffler body would hang way below the bottom of the bumper and it would look really daffy.

There is a dual-in/dual-out 18" magnaflow muffler in the 4x9in shape, similar to what bigjae installed only 4" longer, but I'm afraid that might be louder than the 5x8 in the 14" variety due to less overall sound deadening material in there.
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Old 07-15-2015, 05:53 PM   #35
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OK, I was thinking you could make it fit, oh well. I know the Car Chemistry inserts will great "IF" your not happy after your current install. I'm sure the 5 x 8 Magnaflow will work well for your application, but if you think it's still to loud the two CC inserts would fix it.

http://www.summitracing.com/parts/cci-3di25r/overview/


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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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