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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 03-15-2012, 05:02 PM   #81
reupgang
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Where can I get one of these for a 323 mt
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Old 03-20-2012, 02:12 AM   #82
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Where can I get one of these for a 323 mt
sorry they only are compatible with automatic transmission e46's
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Old 06-22-2012, 12:08 AM   #83
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Fixed the screeching sound...replaced the muffler with a dual 2.5 in AND outlet.

My shop looked at some chart and figured the 16533 is good for 207hp. So basically this system is not good for FI'd cars. The dyno died off above 5500 rpm which is when the screeching started. Basically it was choking my car. My top end power feels so much better with the new exhaust.
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Old 06-22-2012, 01:50 AM   #84
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Fixed the screeching sound...replaced the muffler with a dual 2.5 in AND outlet.

My shop looked at some chart and figured the 16533 is good for 207hp. So basically this system is not good for FI'd cars. The dyno died off above 5500 rpm which is when the screeching started. Basically it was choking my car. My top end power feels so much better with the new exhaust.
thats weird thats its good for only 200 hp...
so if i had the screeching sound that means I'm above 207 whp lol are you sure thats the real reason? i think aggie had it on his car for a while when he was above 207 whp fur sure
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Old 06-22-2012, 03:12 AM   #85
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Fixed the screeching sound...replaced the muffler with a dual 2.5 in AND outlet.

My shop looked at some chart and figured the 16533 is good for 207hp. So basically this system is not good for FI'd cars. The dyno died off above 5500 rpm which is when the screeching started. Basically it was choking my car. My top end power feels so much better with the new exhaust.
Any part numbers or pictures? I want to do the same to mine dual in dual out What type of tips did you use? Thanks.
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Old 06-22-2012, 08:40 AM   #86
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thats weird thats its good for only 200 hp...
so if i had the screeching sound that means I'm above 207 whp lol are you sure thats the real reason? i think aggie had it on his car for a while when he was above 207 whp fur sure
Not sure. The place is a magnaflow dealer. He looked some chart and stated something like the muffler flows up to 207 hp. He thinks that I had the screeching sound since I was well above 207 hp. Which leads me to believe that there might be a restriction in your system? Or there is a large leak.

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Any part numbers or pictures? I want to do the same to mine dual in dual out What type of tips did you use? Thanks.
I have it, I have to look at my invoice. The tips are the same as what came with the original system. Instead of a Y exiting the muffler its two separate pipes.

I always thought it was odd, didn't think it was killing my top end like it was. The car now revs nicely to redline instead of dying off.
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Old 06-22-2012, 02:50 PM   #87
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I'm real interested, can you share some pics of the install?
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Old 06-22-2012, 04:55 PM   #88
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So if you are under 207hp, will it hurt performance if you put the dual in dual out setup as you did?

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Old 06-22-2012, 11:15 PM   #89
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So if you are under 207hp, will it hurt performance if you put the dual in dual out setup as you did?

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No idea. I'm trying to get the part # but here are some pics...





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Old 06-23-2012, 03:34 AM   #90
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Looks really nice I like how the tips are the same. Is the muffler also shifted back a little bit? Did your muffler shop have to create those two tubes connecting from the muffler to the tips? Have you noticed any difference in tone/sound since you have done the dual in dual out? (besides screeching) I used to have a tse3 and loved how throaty it sounded and how it "burbled." I didn't realize when I switched to the magnaflow it was a dual in single out. It might just be in my head, but I think a true dual exhaust definitely has a different character/sound. I wanted to gain some of this back with the dual in dual out.

Thanks for all the pictures! Just need some part numbers.

Last edited by Brian N; 06-23-2012 at 03:36 AM.
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Old 06-23-2012, 08:03 AM   #91
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Brian I'm not sure it will be a true dual cat-back if you change just the rear muffler because of the xpipe

This is very interesting because I didnt think about this before. But now that you've brought it up I took a closer look at that rear muffler in the 16533 and I believe it to be a 14218 which is a dual 2.5" inlet/single 2.5" outlet and on top of that magnaflow downsizes the single outlet down to about 2.25" before it splits to the tips. Now that seems strange to me that this exhaust makes power like that, and certainly makes sense why you weren't making as much power with your SC'd motor. I really wonder what Magnaflow's thinking was on this???

Bigjae, did you notice any change in the sound of the exhaust after changing the rear muffler? I really love the sound of this exhaust and would hate to change the tone very much....

By the way, I've been looking at modding a different part of this exhaust to tone down the loudness with my headers just a bit, and hopefully eliminate that bit of rasp between 3-4.5k RPM. I have a seperate thread on that: http://forum.e46fanatics.com/showthread.php?t=928024 Seems there may be more than one way to perfect this cat-back.
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Old 06-23-2012, 06:43 PM   #92
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Brian I'm not sure it will be a true dual cat-back if you change just the rear muffler because of the xpipe

This is very interesting because I didnt think about this before. But now that you've brought it up I took a closer look at that rear muffler in the 16533 and I believe it to be a 14218 which is a dual 2.5" inlet/single 2.5" outlet and on top of that magnaflow downsizes the single outlet down to about 2.25" before it splits to the tips. Now that seems strange to me that this exhaust makes power like that, and certainly makes sense why you weren't making as much power with your SC'd motor. I really wonder what Magnaflow's thinking was on this???

Bigjae, did you notice any change in the sound of the exhaust after changing the rear muffler? I really love the sound of this exhaust and would hate to change the tone very much....

By the way, I've been looking at modding a different part of this exhaust to tone down the loudness with my headers just a bit, and hopefully eliminate that bit of rasp between 3-4.5k RPM. I have a seperate thread on that: http://forum.e46fanatics.com/showthread.php?t=928024 Seems there may be more than one way to perfect this cat-back.
Yeah I realize that the x-pipe is in there, but i still think it might change it a little bit since it's coming out of two separate tubes instead of one tube that has been split to two tips. Maybe not though.

I think they did a dual in, single out because it was much easier to mount the "dual" tips we have that way. The tips on our catback system are prefabricated and mass produced and sold for other makes/models. So I think it was much easier to get the oem look/offset by doing this. Just my theory though.

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Old 06-23-2012, 08:21 PM   #93
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The shop did have to fab the pipes between the muffler and tips.

The tone is the same, just louder. It's a little louder than I want but it does sound nice!
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Old 06-23-2012, 09:17 PM   #94
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I believe it, because it looks to me from the pictures like it is a smaller muffler than the stock muffler. Did you notice if it had the tru-x crossover inside or was it straight through each side?
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Old 06-24-2012, 08:35 AM   #95
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I'll look, believe it is straight through.
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Old 06-25-2012, 03:45 PM   #96
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can't believe i went through all my drama with magna flow because of their s h i t t y r&d .. i could have waited and went this route
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Old 06-25-2012, 04:33 PM   #97
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Yup. I'm not happy either.
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Old 06-25-2012, 09:42 PM   #98
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So as noted we have dual 2.5" pipes going into a muffler with a single 2.5" outlet, then splits to the tips. I asked Magnaflow whats up with that because it seems like a restriction, and why not use a dual 2.5" inlet with a single 3" outlet muffler instead. This was their response:

Quote:
Being it is at the very back of the kit it shouldn't make too much of a difference also in looking at the rest of the kit with the mufflers and X pipe that is being run, it could have been made to help with sound. That kit could have droned to much and that is why there is the X pipe as well as the mufflers and that 2.5" exit at the tips could help with sound management as well.
bigjae, Any luck finding that part number? It looks like a smaller muffler, maybe only 11" long. The muffler in the 16533 is a 5x8 oval that is 14" long.

This makes me wonder if/how the tone or sound would change if we tried a 2.5" dual inlet/3" single outlet muffler....
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Old 06-25-2012, 11:22 PM   #99
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Haven't had a chance the bug the shop...I've been dealing with a tuning issue.

I think car on stock power will be fine which is what magnaflow is probably thinking. As I said earlier, the shop that did my install looked at some chart and said a single 2.5" pipe is good for 207 hp. It wasn't the particular muffle because I replaced the rear section under warranty.

But this new muffler does drone quite a bit more. Not sure if that's related to the massive tuning issue I am having or what.
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