Originally Posted by Airflow' post='363127' date='Dec 3 2006, 11:56 AM

Hi My friend! My exhaust about 3000EUR with 350EUR shipped to China. not very expensive! If you are looking for a proven package, and not just a simple exhaust, the RDsport's exhaust is better choice!

Originally Posted by andy545' post='362970' date='Dec 3 2006, 02:57 AM

I think there is some misunderstanding going on with regards to the "quad" terminology.

Both RD and Hamann are true quads (meaning 2 exhaust pipes culminating to 2 exhaust tips on each side)
as both direct exhaust to both sides.

However there is a major difference in views and desire (V8 and I6 owners) and also how each manufacturer achieves the end result. Agreed?

Someone who owns a V8 has 2 banks of cylinders who would ideally like to see 1 pipe for each side all the way to the back. 1 muffler for each side. (yes, yes, Hamann has 2 mufflers as well !!) Anyway, this setup already exists for E60 V8's down to the last resonator...so it's only natural to want to continue this "straight flow" setup for someone owning a 545i/550i and wanting a quad. RD setup seems to fit the bill better in this regard and the picture shows this. That's all to it - I understand the comments made with regard to "true quad" from the V8 owners beacause I know what they mean.

Why continue to the back with one pipe - and then piggy back from one side to the other? Well it's easier and cheaper. and most probably also technically correct and viable. ats77 is right, the RD is expensive, but personally if I were to take the decision and effort to go for a quad then it would look like the RD, again due to the V8 setup. If I had an I6 the Hamann would be a no brainer. It's all one pipe from after the headers down to the end muffler. Chuck a Hamann on and voila, your finished. But with a V8 you have a more native solution from the resonators. It's technically and optically more elegant with a RD type setup.
I hope this clears it up so we can go on enjoying this thread.

Great thing about this forum is contribution. We have had now pics and audio from members offering different alternatives. Let's respect that on both sides.

Originally Posted by Matt BMW California' post='363177' date='Dec 3 2006, 11:25 PM

Rizbel - that is like saying a Honda Civic and an M5 are the same because they are both cars! That config is faking a the reason why one would normally have a quad exhaust - to improve movement of exhaust outflow. It has tuned mufflers to make it sound funky, but thats it. It wont allow it to perform any better because its still really just a single exhaust posing otherwise...

think of it like an modded out 525 with M5 badges.... for looks - this is a GREAT mod, but I dont think this will make a car go perform better - consider it more like the m-tech mod. looks great though!!

Originally Posted by quad_m' post='363204' date='Dec 4 2006, 04:54 AM

hello Airflow ,

so you paid 2650+350 shipping to China? I heard its sold in the states more than 6 grand
where did you order it from which company??

Originally Posted by BetterMakeWay' post='363212' date='Dec 3 2006, 01:14 PM

Please see the above comment dear Matt. How do you know if the Hamann quad exhaust or any other similar style exhuast will not perform better? Did you study in person the movement of the gases? Do you know the backpressure value of the stock final resonator and for the hamman ones?
I'm not saying it does. I don't ahve proof for it, but neither i'm saying it doesn't or that it cuts power. Ok?

Sorry but this is the kind of "BS" ats initially talked about. Don't take the term that negative or insulting, but when one starts to say smth like that it's acceptable but when others fallow the same thing then we've got a problem and that's disinformation. No sweat though we are a big happy family and a good d-bate even if it's hot never did wrong as long as it doesn't get too personal or way out of track.

Cheers my friend!

Originally Posted by Airflow' post='363322' date='Dec 3 2006, 07:53 PM

complete exhaust with Sport headers and Sport Catalytic is cost more than 10K EUR.


I just bought X-flow and L+R muffler for my car. I order it from RD China agent.

Originally Posted by EuroCarFan' post='363330' date='Dec 3 2006, 08:20 PM

Yeah, if you buy the complete set from the headers, cats, x-pipe and quad exhaust conversion, it's about $10K in the US but if it's just the quad exhaust, it's about $2700 so the price is not that far off from a Hamann quad. The $10K price being thrown around on this and other thread is misleading.