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      09-17-2014, 04:58 PM   #1
HEY32G
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Muffler Delete/Straight Pipes?

I test drove an Z4MC this past weekend. The mufflers had been taken off. The sound was VERY nice, and I didn't feel any loss in performance, as a matter of fact it felt very strong (had 101,000 miles on it). Just wondering, is that just a simple modification where you take out the mufflers and weld pipes straight through? Does it have any effect on emissions? Once again, I really liked the sound!

I tried searching but couldn't find exactly what I was looking for, and I apologize for my ignorance on the subject.
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      09-18-2014, 01:31 AM   #2
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no its probably just a muffler delete, anything more and it would of been crazy loud.
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      09-18-2014, 12:25 PM   #3
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Quote:
Originally Posted by Beedub View Post
no its probably just a muffler delete, anything more and it would of been crazy loud.
So with a muffler delete, you just cut out the mufflers and weld the pipes straight back to the exhaust tips?
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      09-18-2014, 12:31 PM   #4
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Quote:
Originally Posted by HEY32G View Post
So with a muffler delete, you just cut out the mufflers and weld the pipes straight back to the exhaust tips?
Yes. To answer your earlier question, emissions aren't effected at all with this method.
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      09-18-2014, 12:47 PM   #5
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Quote:
Originally Posted by HEY32G View Post
So with a muffler delete, you just cut out the mufflers and weld the pipes straight back to the exhaust tips?
I guess that's a way to do it but we can't really tell you how it was done without a picture.
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      09-18-2014, 02:36 PM   #6
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FWIW
there are several members here that have gutted the OE mufflers and welded a pipe inside.
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      09-18-2014, 03:59 PM   #7
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I fired mine up with mufflers off once to see how it sounded. Buy a set or rpi mufflers and you will be extremely happy. Same sound but more refined and crisp.
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      09-18-2014, 06:34 PM   #8
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The owner described it as just removing the muffler, so I'm sure that's all it was. Like I said, the sound was great. Thanks for the input, guys.
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      09-18-2014, 06:35 PM   #9
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Quote:
Originally Posted by dubsesd View Post
I fired mine up with mufflers off once to see how it sounded. Buy a set or rpi mufflers and you will be extremely happy. Same sound but more refined and crisp.
I'll look into that. Thanks.
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      09-20-2014, 04:08 PM   #10
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Check out Rogue Diablos too. They are about 75% of the volume with the less desirable sounds filtered out. It's the most powerful sounding exhaust IMHO.
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      09-20-2014, 07:13 PM   #11
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Quote:
Originally Posted by HEY32G View Post
The owner described it as just removing the muffler, so I'm sure that's all it was. Like I said, the sound was great. Thanks for the input, guys.
A muffler delete is exactly that. Removing the stock muffler and putting in two straight pipes. I had a muffler delete on my old car and it is not the loudest by far. RPi's would be louder in my opinion from watching youtube videos/experience. A muffler delete would run you about $150 max at a exhaust shop, while RPi's are $800 uninstalled. A muffler delete is a very cheap way to get a great sound out of the engine because these BMW engines sound amazing on their own.

Here are two videos.

Muffler Delete:


RPI:


YouTube videos are not the best but I would try to find both in person if you can.
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      09-21-2014, 06:00 PM   #12
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Quote:
Originally Posted by dubsesd View Post
I fired mine up with mufflers off once to see how it sounded. Buy a set or rpi mufflers and you will be extremely happy. Same sound but more refined and crisp.
What he said. RPIs are LOUD and look great. There isn't really much sound deadening built into them either. But like Exist said, it would be cheaper to have an exhaust shop weld up some pipes after removing the stock mufflers.

It won't effect emissions as far as what gases the car is spitting out, but check local laws for exhuast modifications because the sound might be too loud.
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      09-21-2014, 10:27 PM   #13
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The rasp is unbearable
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      11-12-2014, 08:43 PM   #14
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Quote:
Originally Posted by pokeybritches View Post
Check out Rogue Diablos too. They are about 75% of the volume with the less desirable sounds filtered out. It's the most powerful sounding exhaust IMHO.

I hope you are right, just ordered a pair.

From what people have said I don't think I will be disappointed as I like it loud.

Why is waiting for parts always the longest thing.
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Last edited by ANILE8; 11-13-2014 at 07:08 PM.
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      11-13-2014, 07:06 PM   #15
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I have the RE midpipes and cans.
Yea, it's loud.
I was going to call dibs on Rated-M's RE x-pipe, but decided the current setup sounds great and is at the limit of "socially acceptable", even on the freeway.
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      11-13-2014, 07:15 PM   #16
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Just got my RE Diablo's.

One is badly dented inside the shipping box.

Looks like one of the exhaust hangers smashed into the other muffler in transit.

If there was a sheet of 7mm plywood sandwiched between them then this could not have happened.

The packaging could be improved so easily, which would lessen DOA claims considerably thus improving their supply chain efficiency and increase competitive advantage.

I hope Rogue will sort this out.

Very disappointed
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Last edited by ANILE8; 11-13-2014 at 07:22 PM.
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      11-13-2014, 07:21 PM   #17
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Ouch, very sorry to hear.

Do you have the Euro or NA headers? If it's Euro, prepare yourself... the car will be LOUD.
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      11-13-2014, 08:07 PM   #18
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Sorry to hear the piping was dented. I really get annoyed at inadequate shipping protection. UPS/FedEx consistently destroys boxes so you really have to package items REALLY WELL knowing they are gonna be manhandled.
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      11-13-2014, 08:43 PM   #19
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Thanks for the sympathy vote guys.

I have euro headers, I like loud but not really raspy so I will leave the x-pipe stock.

Actually the shipping box was perfect and not torn or damaged in any way.

It is a genuine R/E box with their packing tape sealing everything up so I know the responsibility is on them to get the internal packing up to the job as they can so easily be dented if not shipped carefully.

There was bubble wrap around everything and I didn't even know something was wrong until I took all the bubble wrapping off.

I bought them from iND Distribution who really looked after me and I do not blame them but just the way RE package their mufflers could really be improved upon.

I will let you know when I finlly get a resolution to the problem hopefully not too long, as now the waiting has started all over again.
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