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WANTED Z4M exhaust bypass pipes.

Buying and selling Z4 related goods (private sales only, no traders)
Matt.13
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Z4M exhaust bypass pipes.

Post by Matt.13 » Sat Sep 22, 2018 11:13 pm

I’d be interested
2nd gear sideways

r0bb0
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Z4M exhaust bypass pipes.

Post by r0bb0 » Sun Sep 23, 2018 12:12 pm

Might be interested also

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srhutch
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Z4M exhaust bypass pipes.

Post by srhutch » Sun Sep 23, 2018 2:10 pm

I'm now out.
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Yorkie Z
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Z4M exhaust bypass pipes.

Post by Yorkie Z » Tue Sep 25, 2018 4:55 pm

srhutch wrote: Sun Sep 23, 2018 2:10 pmI'm now out.
How come you changed your mind?
A Dirty M///

kbee
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Z4M exhaust bypass pipes.

Post by kbee » Sun Sep 30, 2018 5:02 pm

As a new owner of a 35is would these pipes be compatible with my exhaust, I would be in if so
2013 35IS pear white with all the electical bits

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srhutch
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Z4M exhaust bypass pipes.

Post by srhutch » Sun Sep 30, 2018 8:12 pm

Yorkie Z wrote: Tue Sep 25, 2018 4:55 pm
srhutch wrote: Sun Sep 23, 2018 2:10 pmI'm now out.
How come you changed your mind?
With the GruppeM the gutted rears were too much, so this was plan B. However having run the car with just the GruppeM again I’m happy as is.
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Philjwb
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Z4M exhaust bypass pipes.

Post by Philjwb » Sun Sep 30, 2018 9:03 pm

Possibly interested in this, but not sure about fitting and longevity. Its not clear to me how these should be fitted. Is there a double skin on the back boxes? Are they welded to the outer skin only? If so, how strong and reliable can this weld be?

I don't want to ruin my perfectly good back boxes, but I would like a bit more theatre. - I did a similar mod on my old 986 boxster S which involved simply drilling 2 holes into the internal piping through the end pipes and the results were great.

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srhutch
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Z4M exhaust bypass pipes.

Post by srhutch » Sun Sep 30, 2018 9:14 pm

You need two holes drilling in the pipes either side of the backbox.
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Philjwb
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Z4M exhaust bypass pipes.

Post by Philjwb » Sun Sep 30, 2018 9:28 pm

Concerns from this thread:

viewtopic.php?f=2&t=35500&start=30

"The tail pipes are double skinned. By the look of the pics on here the pipe has just been welded to the outer skin. Now this outer skin is not air tight and in fact has two 10mm square holes either side of the tailpipe. So instead of the gas coming out or the tailpipe you will have it coming out of these two side holes. Even worse some of the gas coming from the back box will now come through these holes. This could potentially cause a couple of problems - one you may get exhaust gases coming inside the car. Also if you had a particularly strict MOTer they could fail it as an exhaust blow."


"We discussed this at Kustom101 before doing the mod. The best option is to cut through the outer trim (it isn't really a skin just a trim piece) and weld directly to the actual tail pipe. Now i decided not to bother with this, because it was more of a fiddle and the exhaust gasses are already right at the rear of the car. Also, the fit for the pipes is tight. If i notice black deposits building up where they shouldn't be I will do it as described, but looks fine so far."

Adamjoe87
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Z4M exhaust bypass pipes.

Post by Adamjoe87 » Tue Dec 10, 2019 1:52 pm

Mike

Are you still able to do the bypass mod for people?

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