Dixis Titanium Exhaust and H Pipe - BMW M5 Forum and M6 Forums
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post #1 of 79 Old 22nd May 2007, 07:29 AM Thread Starter
NobleM400
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Dixis Titanium Exhaust and H Pipe

I just picked up the Dixis Titanium Exhaust and H pipe from an M5 Board member (thanks!).

The Dixis is 26.4 lbs. The band clamps (not included) are 1.1 lbs. The stock rubber hangers (reused) are 1.3 lbs. That's a total of 28.8 lbs. The stock exhaust is 79.8 lbs. That's a 51.0 lb difference between the Dixis and the stock system.

Here are some pictures. I'll take some video next. Unfortunately, I let the batteries run out on my HD camcorder.

Stock exhaust:





Stock neck-down:





Here's a look at the stock main cats attached to the headers, sometimes called the precats. They're metal matrix, but high cell-count:



Here are the main cats, sometimes called the secondary:





The first thing that had to be done is cutting the stock pipe. The pipe was cut, then the cut was smoothed, so that it doesn't impede exhaust flow.



Here's the Dixis titanium exhaust:







Close-up of the welds. With titanium, because it is so hard to bend, the shaper turns are welded, while the shallower ones are mandrel bent.



Single wall, flame treated dual tips, 80mm each:



Band clamps are used to connect the exhaust to the stock "section 1" pipes, since the diameters are exactly the same:



It uses an H pipe balancing tube instead of an X pipe:



Here's another look at the tips on the car:







Sound wise, the exhaust is quieter than I expected for such small mufflers, especially with titanium.

Idle is a little louder than stock, though it has a fuller presence. There's absolutely NO drone at all, which is AWESOME. I cannot stand resonance at all, especially with a luxury oriented vehicle.

With low throttle, it's close to stock volumes inside the car, though a bit louder outside. Cruising is comfortable and quiet.

With the mid-throttle, you definitely hear more of the exhaust, though not a lot.

With heavy throttle, or with the throttle completely buried, you can definitely hear the exhaust. There's a far better balance between the induction noise, engine noise, and the exhaust note. At high RPM's, there's a smooth, ramped up scream. Surprisingly, it's not raspy at all, despite the removal of the resonator. There's no crackle or tinny sounding buzz to the exhaust note at all, just a building crescendo to redline.

Overall, I love it. I like how it's reasonably quiet still, because that allows me to increase the noise with headers or high flow cats. If it's too loud to begin with, swapping cats will make it unbearably loud.
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Last edited by kees; 22nd May 2007 at 01:15 PM. Reason: Added pictures as attachments
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post #2 of 79 Old 22nd May 2007, 07:33 AM
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post #3 of 79 Old 22nd May 2007, 10:40 AM
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a 51.0 lb difference is a lot ...nice exhaust system
nways installition duration?

Last edited by RKN; 22nd May 2007 at 10:41 AM.
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post #4 of 79 Old 22nd May 2007, 12:28 PM
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nice one mate nice sound weight save all gotta be good

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not delivered till next june
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post #5 of 79 Old 22nd May 2007, 01:02 PM
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Nice exhaust and pictures! Prehaps some video clips......

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post #6 of 79 Old 22nd May 2007, 01:52 PM
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I like it !! Nice welds it looks of really good quality. thanks

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post #7 of 79 Old 22nd May 2007, 06:01 PM
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I appreciate all the picts. Looks great.

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post #8 of 79 Old 22nd May 2007, 06:23 PM
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That is absolutely SIIIIICK!!!

Sound/vid clips or ban!

Oh, any reason you didn't add the section that replaces the 2ndary cats?

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Last edited by ALTANertive; 22nd May 2007 at 06:26 PM.
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post #9 of 79 Old 22nd May 2007, 06:29 PM
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Very sweet exhaust...Hope to see those on our next Vegas Meet

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post #10 of 79 Old 22nd May 2007, 08:30 PM Thread Starter
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Quote:
Originally Posted by ALTANertive View Post
That is absolutely SIIIIICK!!!

Sound/vid clips or ban!

Oh, any reason you didn't add the section that replaces the 2ndary cats?
Yeah, will definitely do the video in a day or two.

In terms of the Section 1, I didn't add it because I bought the Dixis exhaust rather unexpectedly.

Is Eisenmann the only one who makes the straight through Section 1?
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