What is the correct name for this exhaust piece?

[Iowa911]

I am looking to list this item in the classifieds, but I'm a little confused as to the correct name for it. Is it a euro pre muffler? Cat bypass? I'm sure one (or all of you ) can help me out. It has the numbers 930.111.183.03 on it. It is made by Gillet. Also what kind of price would be fair?
Thanks in advance for your help.

[Rot 911]

Euro pre muffler. Must have come off a euro 911 with those numbers. No idea on a fair price.

[my911cab]

Looks like a euro pre muffler or maybe an aftermarket one

[Iowa911]

Well, at least I know it wasn't a stupid question. It is new, never installed. So far 1 vote each for Cat bypass and euro pre-muffler. By the way, what is the difference?Here is another photo.

[dw1]

It is my understanding that a "cat bypass" is a straight pipe, e.g. Bursch BA-7904-WO, while a premuffler has some sound attenuation functionality and looks like the part shown in your post.

The premuffler comes in (2) flavors: the original euro-type, and the aftermarket replacement that can be used on US-spec cars and includes a mounting location for the O2 sensor.

Fabspeed actually calls their premuffler a "premuffler/cat bypass" to confuse things further

According to the Dansk catalog, your part is:
-------------------------------------------------------------
Pre-silencer/intermediate exhaust

Dansk Productnumber: 92.100
Alternative productnumbers: 93011118301; 93011118303

MODEL, MOTOR, YEAR
911 Carrera, 3.2, 08/83-07/89
911 SC/911 Carrera, 2.7-3.0, 08/75-07/83
930 (not turbo), 2.7-3.0, 08/75-07/83
--------------------------------------------------------------

And, yes this is the part used on euro-spec cars in place of the catalytic converter.

I hope this helps.

[tcar]

Originally Posted by my911cab

Looks like a euro pre muffler or maybe an aftermarket one

Definitely not aftermarket. In the beginning post he gives the Porsche part number.

[Iowa911]

Hey guys I really appreciate the input. Anybody have a ballpark value? When I do a search I'm seeing prices for pre-mufflers ranging from $250-$550. Those are all aftermarket. I'm not looking for top dollar but I don't want to sell it for $100 and find out later it was worth $750.
Thanks

[slodave]

I know someone who picked up a OEM Euro-premuffler $65.00 and it was well used. Dansk made a copy that has the same basic shape, but was about $450.00 new. I picked up a used good condition Dansk for less than $150.00.

Dave

[Iowa911]

For clarification, this one has not been used and does have the o2 mounting location.

[slodave]

The build quality of the Dansk is better than the OEM. I know the numbers I gave were for used pre muffs, but I don't think you are going to find many people that know what a new OEM pre muff is going to cost. Maybe because it is a new genuine Porsche part, you can get more for it. I don't know.

You can always start with a bigger number and if it does not sell, keep lowering.

Dave

[slodave]

OK, according to Pelican Parts, the thing is worth $591.75, but there is no picture to make sure it's the same part.
http://www.pelicanparts.com/cgi-bin/ksearch/pel_search.cgi?please_wait=N&forumid=&threadid=&command=DWsearch&description=930.111.183.03&x=0&y=0

[Eagledriver]

That's what it would be worth if someone wanted it new from Pelican. There is no functional advantage to it over a cat bypass. I'd try for 300 at first and see what happens.

-Andy

[Iowa911]

Thanks for all of your help everyone. I knew you'd come through.

[dw1]

Your photo doesn't show the O2 mounting location.

The Dansk part - threaded connector on the body:


The Fabspeed part - threaded connector on the pipe:


A quick search will show that these units, with the O2 mount, go for $275 - $400 new. Resale value - maybe 1/2 to 3/4 of that.

The existence of the O2 sensor mounting location is preferred by many for US-spec cars, and may impact the value.

My sources list the part numbers for the units with the O2 mounting bung as 93011118301INOX; 93011118303INOX.

The difference in sound level between the straight pipe cat bypass and one of these unit is significant, even with a standard muffler.

[porsche930dude]

just wondering what does a pre-muffler have on the inside is it like a glass pack or just all open like a resonator?

[SCWDP911]

I sold one that had the bung for about $100-150 if I remember right. That was last year. I am pretty sure it was stainless. I was told by the PO it came off of a euro car.

[slodave]

Originally Posted by porsche930dude

just wondering what does a pre-muffler have on the inside is it like a glass pack or just all open like a resonator?

This is the inside of a Dansk, which looks like an OEM as well.