Wanted

[roadvoyager1]

Again can only tell you what is on my Feb 1999 2.8, (with M52B28TU engine) but mine is a 2 part system. The rear is like this:-

http://www.realoem.com/bmw/enUS/showparts?id=CH32-EUR---Z3-BMW-Z3 2.8&diagId=18_0383

When you fit an aftermarket back box you will almost certainly not get the flap in one of the tailpipes This is operated by a vacuum system through parts 5 to 12 in the realOEM diagram. Below 3000 rpm the flap is closed and all exhaust goes through one of the pipes. Above 3000rpm the valve opens and both tailpipes are used. Apparently it makes the engine sound more sporty at higher revs, although when driving I think there is hardly any difference. Perhaps somebody who understands this system better can explain more about it. As far as I am aware it only affects the sound of the exhaust and has no significant effect on performance.

 

[t-tony]

I rang Andrew Page this morning and they can only supply the front pipe (ie the cat section) they have no listings for the rear part of the exhaust. Front pipe £160 inc VAT. + £10 surcharge on the old unit !! ( I thought he was joking - he wasn't) Euro Car Parts, same scenario front pipe/cat only available £113 + VAT. I can try GSF on Monday but they're much dearer than these two.

Tony.

 

[bruce&kim]

Thanks Tony for your help have given euro parts the part code they are going to get back to me...have located a rear Cat back so hoping its a 2 part

 

[Grumps]

Hi, if we're not too busy tomorrow I WILL try and find out for you. The ones I've just mentioned were originally a 1 piece system from the manifold to the tail pipe, hence why we call it a cut and shut,ie we make a joint in the system where there should not be one.

Tony.

Do you think this may have been my problem Tony when I was looking to change?

 

[t-tony]

Do you think this may have been my problem Tony when I was looking to change?

No I don't think so Dave, these were two 4 cylinder engined cars. But as we're looking at after market systems it is hard to be totally sure. As time goes on I think these exhaust will become rarer and fewer will be produced so if it was me I would save the money and go for a Stainless steel system then it's job done. The company quoted at ECP today have never made the rear part for the 2.8 and they obviously don't consider it worthwhile stocking them. Also Pages supplier's say the same thing too. SS is the way to go on a "keeper" I think.

Tony.

 

[Grumps]

No I don't think so Dave, these were two 4 cylinder engined cars. But as we're looking at after market systems it is hard to be totally sure. As time goes on I think these exhaust will become rarer and fewer will be produced so if it was me I would save the money and go for a Stainless steel system then it's job done. The company quoted at ECP today have never made the rear part for the 2.8 and they obviously don't consider it worthwhile stocking them. Also Pages supplier's say the same thing too. SS is the way to go on a "keeper" I think.

Tony.

Good info mate. Thanks.

 

[GazHyde]

Late to the party... pretty much all the exhausts we've seen in the zed shed have been 2 piece, the rear section being from the cats backwards (almost the length of the car).

I'd agree having had a stainless system fitted by a Long Life dealer that it's the way forwards - but then I wanted some extra noise that you would never get with a stock system.

 

[Dickymint]

I have contacted several places about getting a exhaust made, mine is the twin pipes all the way to the back box and when you say that the only answer you get is ummm yea yea well bring it over and we will see type answer, I take it that the middle boxes are also cats? well I intend getting the middle and rear boxes made as I noticed where they join the downpipe the clamps are just a bog block of crumbling rust

 

[bruce&kim]

Just a little update euro parts quoted £632.00 For the correct part so got a refund and ordered this http://www.cats2u.co.uk/product_info.php?products_id=28906 seems the correct part and its stainless also found this back box and ordered one http://exhaustdirect24.co.uk/product-Silencers_BMW_Z3_2.8__,03.16_Rear_Silencer_,12724.html although it shows one tail pipe they tell me it has 2
hope this is of help to anyone in the future with a 1999 facelift 2.8

 

[t-tony]

Good info, thanks.

Tony.

 

[bruce&kim]

just a little update the part for my 1999 2.8 facelift http://www.cats2u.co.uk/product_info.php?products_id=28906 was indeed the right one and as its s/s was a a good buy and very quick delivery however the rear box which it transpires from Poland was a pile of crap even though they assured me it had two tail pipes it has one and doesn't resemble the oem part in anyway and the return postage is more than the part cost so please be aware of this company. So I now need a rear box has any one tried the universal back boxes from ebay ? http://www.ebay.co.uk/itm/UNIVERSAL...pe:2.8&hash=item25ac4847f0:g:1r8AAOSwT6pV20ii

 

[Alex Funnell]

I thought the 2.8 had the same exhaust as the 2.0. Having just done the cat back I think it has the twin cat which is one piece front to back including the silencer

 

[Alex Funnell]

Oops didn't read the rest of it. I have just sawn the back section off my exhaust and fitted the supersprint. So I have the section from the y piece forward but I have cut in to the resonator a bit with the chop saw. It does have the vacuum flap as well. I was going to scrap it but you can have it if you want.

It is pretty much this pic below (this is someone else who has cut)

The resonator bit is far left but if you only need the silencer bit it may fit.
It depends if you want a brand new part or not. It is also at my parents house in surrey

 

[t-tony]

That's the same point at which we had to cut and shut the 1.9 systems at work.

Tony.

 

[bruce&kim]

Thanks for the offer Alex but I going to try and get a stainless back box that way the whole system is the same

 

[Alex Funnell]

I would recommend the supersprint if you want a more sporty note, but it doesn't drone when crusing.
I got mine here https://balancemotorsport.co.uk/

 

[bruce&kim]

Thanks again Alex reading up supersprint seems the right choice are you sure the 2.0lt is the same back box as the 2.8 as they don't list that ? and having ordered 3 exhaust parts and only 1 is correct so far...I have emailed them but no response in 2 days...

 

[Alex Funnell]

Yea i'm pretty sure, I think it's just a different adapter in the middle.
2.8 = 786606

http://www.supersprint.com/ww-en/bmw-z3-roadster-28-97--0898.aspx

2.0 = 786606

http://www.supersprint.com/ww-en/bmw-z3-roadster-20i--99---00.aspx

Just check the to be fitted as kit with bit.

As you have a split centre section you won't have to cut. Should just bolt on.

I will try to do a video soon of the sound, it is louder than stock and pops/burbles more but it isn't what I would call boy racer at all

 

[Alex Funnell]

I made a short vid inside the car, I will have to get one of my mates to do an external vid at some point

 

[bruce&kim]

Cheers Alex sounds good ! and not too noisy. I spoke to balance motor sport today and they are trying to locate one apparently its under development ? But he seemed a very nice chap and sure he will try his hardest...Thanks for all your help as well you are a gent sir