Chinese down pipes, charge pipes

JimsZ said:
Here's the link to what happened to me when I took my 35i (with newly decatted downpipes), to the MOT...

viewtopic.php?f=23&t=99202

I include the exhaust emission stats in that post too.
Click to expand...


Perfect!
Any issues with it throwing codes? - looks like it has o2 sensors both sides of the cat (usually to check if the cat is working correctly).
 
Nick9one1 said:
JimsZ said:
Here's the link to what happened to me when I took my 35i (with newly decatted downpipes), to the MOT...

viewtopic.php?f=23&t=99202

I include the exhaust emission stats in that post too.
Click to expand...


Perfect!
Any issues with it throwing codes? - looks like it has o2 sensors both sides of the cat (usually to check if the cat is working correctly).
Click to expand...

That was stjohnny's comment not mine, I have a 28i :thumbsup:

Slightly off topic I've been reading up on the super sprint website. Some good reading but it's 28i related sorry!! :oops:

https://www.supersprint.com/ww-cn/full-exhaust-system-for-bmw-z4-28i.aspx

Also shows some impressive gains in hp and nm. :driving:
 
wow, and I thought the VRSF pipes were overpriced...

Capture.png

I like how they have the sprung joints, probably makes fitting a little easier.

This line confirms my suspicions on the o2 sensors.

CAUTION ECU tune compulsory to avoid the Check Engine Light. Alternatively it's possible to extend the lambda sensor wires and plug the sensors after the secondary OEM cat or the Supersprint sports cats
Click to expand...
 
Nick9one1 said:
JimsZ said:
Here's the link to what happened to me when I took my 35i (with newly decatted downpipes), to the MOT...

viewtopic.php?f=23&t=99202

I include the exhaust emission stats in that post too.
Click to expand...


Perfect!
Any issues with it throwing codes? - looks like it has o2 sensors both sides of the cat (usually to check if the cat is working correctly).
Click to expand...
Nick - no probs at all. It had a stage 2 remap on a rolling road when the downpipes were swapped out, I think they corrected the settings so no error codes.
 
I finally fitted the chinese downpipes this weekend!

what a job.. started saturday morning and finished midday sunday.

This is what they look like. Very well made. Nicely polished stainless and really neat TIG welds.
20180208_171326.jpg

for £139 delivered I'm very happy! even came with new gaskets.
 
mcbutler said:
Their are mumblings afoot about making a missing cat an MOT failure in the future!!!!!!!
Click to expand...

Exactly the reason I went with a primary cat delete, not secondary.
It's not possible to tell the car hasn't got cats without removing the undertray - something the MOT station isn't allowed to do.
 
Has anyone else that has these noticed you can now hear the turbo? It's like a whistling sound.

At first I wondered if if not aligned a gasket or something properly but I've double checked everything.
 
Nick9one1 said:
Has anyone else that has these noticed you can now hear the turbo? It's like a whistling sound.

At first I wondered if if not aligned a gasket or something properly but I've double checked everything.
Click to expand...

After l had mine fitted I noticed the turbos whistling a lot but wasnt sure if that was to do with the remap or the downpipes. So are you planning on adding the charge pipe, new air intake maybe FMIC etc? I want to do more to mine this summer including suspension, not sure of the details yet, but it will be great to know what you have in mind for your Z.
 
Nick9one1 said:
mcbutler said:
Their are mumblings afoot about making a missing cat an MOT failure in the future!!!!!!!
Click to expand...

Exactly the reason I went with a primary cat delete, not secondary.
It's not possible to tell the car hasn't got cats without removing the undertray - something the MOT station isn't allowed to do.
Click to expand...

Surely they can see the downpipes have been changed just by looking under the bonnet?
Rob
 
Gaffa22 said:
you can't really see much down that side of the engine Rob, those 6 pots do take up a lot of room :D
Click to expand...

Fair enough, I would have expected the 6 pots to be longer than the 4 pot but not necessarily wider? :?
I thought the N20 was pretty similar to the N54 but with 2 pots lopped off :cry:
Rob
 
Don't know if they are wider than the 4 pop Rob to be honest, i just had a look so see if i could see the down pipes, certainly would not be able to see if they cats or not
 
Gaffa22 said:
Don't know if they are wider than the 4 pop Rob to be honest, i just had a look so see if i could see the down pipes, certainly would not be able to see if they cats or not
Click to expand...

Good news, what they don’t know can’t hurt them :)
Rob
 
Nick9one1 said:
I finally fitted the chinese downpipes this weekend!

what a job.. started saturday morning and finished midday sunday.

This is what they look like. Very well made. Nicely polished stainless and really neat TIG welds.
20180208_171326.jpg

for £139 delivered I'm very happy! even came with new gaskets.
Click to expand...

How are you finding them? How much difference does it make to the noise & performance?
 
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