Z4-forum.com

flybobbie wrote: ↑Thu Jan 11, 2018 11:04 pmCould take the existing off and just smash out the mesh?

I think that's what twinturbo on here did to get a catless downpipe, not sure how he got it tested at MOT time?

Rob

JimsZ wrote: ↑Fri Jan 12, 2018 12:03 am

Smartbear wrote: ↑Thu Jan 11, 2018 10:40 pm

Gaffa22 wrote: ↑Thu Jan 11, 2018 9:54 pmI guessed it would improve exhaust flow, but enough to make it worthwhile ?
I'll bet they are fun to fit

On the 20i I’ve been told 10/15bhp, on the n54 I should think it’s more than that? They also give the exhaust some more snap,crackle & pop
Rob

I'd go for it for sure, they are an easy to fit item. I've actually done this to a 4 pot turbo'd car in the past, with other mods for that marque, helped unleash over 60hp combined with the other mods and remap.

Slightly off topic, sorry...
Do you have any links to the 4 pot versions?

No links im afraid, but ive seen them on ebay for £200ish
Rob

Ok, thanks.

Re: MOT time with the removal of the
The CAT after the turbo was not an MOT failure, well it didn't used to be. My car always passed emissions but this was back in 2003 onwards, might have tightened the requirements up by now

i say go for it.
they look well made in the pics, and as you have said the welds look good, it all depends upon the steel quality and the fitment

willgill wrote: ↑Fri Jan 12, 2018 12:32 am
I forgot the marque had started to reach such pond dredging levels

Meaning what exactly ?

I remember a few people trying a very similar made Chinese exhaust manifolds on Audi s4 twin turbos , for all the welding looked great they cracked either sides of the welds . Granted these are downpipes and shouldn't get quite as hot as a manifold but I'd check them carefully before you install them .

Gaffa22 wrote: ↑Fri Jan 12, 2018 12:30 pm

willgill wrote: ↑Fri Jan 12, 2018 12:32 am
I forgot the marque had started to reach such pond dredging levels

Meaning what exactly ?

Meaning people shoving on cheap jap downpipes rather than spend sensible money on what was once a 'premium' roadster.

willgill wrote: ↑Fri Jan 12, 2018 2:22 pm

Gaffa22 wrote: ↑Fri Jan 12, 2018 12:30 pm

willgill wrote: ↑Fri Jan 12, 2018 12:32 am
I forgot the marque had started to reach such pond dredging levels

Meaning what exactly ?

Meaning people shoving on cheap jap downpipes rather than spend sensible money on what was once a 'premium' roadster.

WALOB

Be sure and avoid this then if you ever venture up to Edinburgh. The Chinese built it and the Eastern Europeans welded it in place.

Just to further push home my point, found some tyres for you

https://www.tirendo.co.uk/rotalla-setul ... 94483.html

willgill wrote: ↑Fri Jan 12, 2018 5:51 pmJust to further push home my point, found some tyres for you

https://www.tirendo.co.uk/rotalla-setul ... 94483.html

I think you’re just taking the p*ss now!
Rob

willgill wrote: ↑Fri Jan 12, 2018 2:22 pm

Gaffa22 wrote: ↑Fri Jan 12, 2018 12:30 pm

willgill wrote: ↑Fri Jan 12, 2018 12:32 am
I forgot the marque had started to reach such pond dredging levels

Meaning what exactly ?

Meaning people shoving on cheap jap downpipes rather than spend sensible money on what was once a 'premium' roadster.

Have to disagree here, BMW has not really been "Premium" for a long time, car finance has made cars like these reachable to a large amount of people including the "pond dredging levels" as you refer to above. You want high end and premium, go buy an aston or an exotic. Don't kid your self in to thinking BMW is high end, it has not been for a long time.

Edit: Also there is nothing wrong with Japanese parts, some are of poor quality, but that can happen with German parts too. Both German and Japanese manufacturers produce some fantastic stuff. The difference is primarily in price, and that's the 'German parts tax'. Not because they are any higher quality like so many want to desperately believe.

Smartbear wrote: ↑Fri Jan 12, 2018 5:53 pm

willgill wrote: ↑Fri Jan 12, 2018 5:51 pmJust to further push home my point, found some tyres for you

https://www.tirendo.co.uk/rotalla-setul ... 94483.html

I think you’re just taking the p*ss now!
Rob

nah I'm really not, my point is uniform. Can't really see what is so hard to get to be fair. If those downpipes were any good then they would be universally adopted and used by tuners/modders alike, same goes for the tyres as an alternative example. If the thought of shoving shite tyres on your car isn't acceptable why would penny pinching on a critical engine component be any different?

Baffled

willgill wrote: ↑Fri Jan 12, 2018 6:04 pm

Smartbear wrote: ↑Fri Jan 12, 2018 5:53 pm

willgill wrote: ↑Fri Jan 12, 2018 5:51 pmJust to further push home my point, found some tyres for you

https://www.tirendo.co.uk/rotalla-setul ... 94483.html

I think you’re just taking the p*ss now!
Rob

nah I'm really not, my point is uniform. Can't really see what is so hard to get to be fair. If those downpipes were any good then they would be universally adopted and used by tuners/modders alike, same goes for the tyres as an alternative example. If the thought of shoving shite tyres on your car isn't acceptable why would penny pinching on a critical engine component be any different?

Baffled

That’s just your opinion, maybe others don’t see it as penny pinching but instead consider the alternatives to be overpriced?
Rob

sunnydays wrote: ↑Fri Jan 12, 2018 6:02 pm

willgill wrote: ↑Fri Jan 12, 2018 2:22 pm

Gaffa22 wrote: ↑Fri Jan 12, 2018 12:30 pm Meaning what exactly ?

Meaning people shoving on cheap jap downpipes rather than spend sensible money on what was once a 'premium' roadster.

Have to disagree here, BMW has not really been "Premium" for a long time, car finance has made cars like these reachable to a large amount of people including the "pond dredging levels" as you refer to above. You want high end and premium, go buy an aston or an exotic. Don't kid your self in to thinking BMW is high end, it has not been for a long time.

Edit: Also there is nothing wrong with Japanese parts, some are of poor quality, but that can happen with German parts too. Both German and Japanese manufacturers produce some fantastic stuff. The difference is primarily in price, and that's the 'German parts tax'. Not because they are any higher quality like so many want to desperately believe.

China's not part of Japan , chinese parts are usually built down to a price

My experience.
I bought my downpipes from:- https://www.mlperformance.co.uk/product ... y-delivery
£400. I got them fitted by rebellion automotive(they said the pipes were a bstrd to fit and took an extra 2 hours to adjust/move things). I stuck in a K&N myself and rebellion remapped it to 385bhp an 450lb/ft.
Sounds like thunder if you lift off over 6k.
On the motorway, it drones a bit if you load it in 7th at 80mph, but if you cruise at 80 you cant hear it.
The real fun is on nice curvy roads in 3rd to 5th, as good as it gets!