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23i exhaust pipe diameter

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
Pbondar

23i exhaust pipe diameter

Post by Pbondar » Tue Mar 19, 2019 7:45 pm

I wonder whether the 23i backbox twin pipes are the same spacing /diameter as the 20i?

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Zed Baron
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23i exhaust pipe diameter

Post by Zed Baron » Tue Mar 19, 2019 8:37 pm

Pbondar wrote: Tue Mar 19, 2019 7:45 pm I wonder whether the 23i backbox twin pipes are the same spacing /diameter as the 20i?
sorry don't know, E89 wasn't even on the list but two other BMW's were and someone had fitted them to an X3.. so for £18 I took a gamble. Replacement genuine BMW ones were just under £90 for the pair :o
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Pbondar

23i exhaust pipe diameter

Post by Pbondar » Tue Mar 19, 2019 8:39 pm

Zed Baron wrote: Tue Mar 19, 2019 8:37 pm
Pbondar wrote: Tue Mar 19, 2019 7:45 pm I wonder whether the 23i backbox twin pipes are the same spacing /diameter as the 20i?
sorry don't know, E89 wasn't even on the list but two other BMW's were and someone had fitted them to an X3.. so for £18 I took a gamble. Replacement genuine BMW ones were just under £90 for the pair :o
Yes I did a similar trick but they didn’t quite fit they were about 3mm oversize ...so have a spare pair now.. :thumbsdown:

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23i exhaust pipe diameter

Post by zedwheels » Tue Mar 19, 2019 8:51 pm

flybobbie wrote: Tue Mar 19, 2019 4:13 am Two versions, i stuck with the lower.
I made a simple bracket that bolts to a bumper mount. Two lengths of exhaust tube welded to bracket.
Then just sawed the the cut out, after tracing off the left side.
Gives it a proper balanced look.
I am slow! Just noticed that you have replaced the whole bumper then ? Have you still got the one in the top photo ?

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