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Z4 Headers
- Thread starter LukeMace
- Start date
Headers like that are always a good visual mod 
I assume you drive a rhd car? (living in the uk)
Check on if these are rhd fitment headers. Obviously the steering column going through the area where the exhaust manifold is also located takes up some space so the headers must be designed to fit in that space. The OEM bmw parts have different parts numbers for rhd/lhd probably for that reason.
Most headers on the market don't fit rhd for that reason
Also in general with 'ebay headers' there are often fitting issues with the lambda probes (and with the the fitting to the rest of the exhaust).
In this case you also delete the cats, which will result in a CEL (if you don't have a tune that corrects that) and probably MOT failure (I dont know the UK rules for that exactly). You can fit aftermarket generic cats (with lambda bungs) further downstream in the exhaust (for example where the stock mid muffler is), with some tig welding. That will also result in that you may have to extend the leads from the secondary lambda's as they are maybe too short.
Check on if these are rhd fitment headers. Obviously the steering column going through the area where the exhaust manifold is also located takes up some space so the headers must be designed to fit in that space. The OEM bmw parts have different parts numbers for rhd/lhd probably for that reason.
Most headers on the market don't fit rhd for that reason
Also in general with 'ebay headers' there are often fitting issues with the lambda probes (and with the the fitting to the rest of the exhaust).
In this case you also delete the cats, which will result in a CEL (if you don't have a tune that corrects that) and probably MOT failure (I dont know the UK rules for that exactly). You can fit aftermarket generic cats (with lambda bungs) further downstream in the exhaust (for example where the stock mid muffler is), with some tig welding. That will also result in that you may have to extend the leads from the secondary lambda's as they are maybe too short.
Paulwirral
Active member
Be careful buying stuff like that , some of the s4 Audi guys bought very similar looking manifolds and they cracked with the heat , granted that was with turbo engines , but they also had problems with quality issues of the manifold flanges not flat and holes slightly out .
If you go ahead ask the supplier to package them up in a plain box and declare it as a gift , you will avoid any tax implications .
Paul
If you go ahead ask the supplier to package them up in a plain box and declare it as a gift , you will avoid any tax implications .
Paul
I've made my own manifolds before and they are a real ball ache! I haven't asked for any other quotes yet but can imagine it'll be steep £.
My thoughts with something like this is that it would (or may) be easier and cheaper to make any mods needed to these than to start from scratch or have someone else do it. There was another member in here that bought some but he hasn't replied to any messages yet
My thoughts with something like this is that it would (or may) be easier and cheaper to make any mods needed to these than to start from scratch or have someone else do it. There was another member in here that bought some but he hasn't replied to any messages yet
