racetested

yxc145, can you weigh the resonator if you have a chance? I'm curious how much weight is saved. I'm just collecting data and researching for my overall goals of this car.

yxc145

Racetested. it's actually pretty heavy. BASE on my years and years of weight lifting experience... i want to say it's about 25 to 30 lbs.
The x-pipe i got weighs about 10 lbs? so you save about 15 to 20 lbs there.

Saks_C350_Sport

Frank can you post the part number for your MagnaFlow? Thank you in advance. Saks.

nbturbos

Well I'm just speaking from my personal experience with a 300, the 350 might sound better than mine did with straight pipes. but IMO I think the X pipe will generally sound better in any car.

FrankW

not sure what is the part number, but they're called Magnaflow Tru-X pipes. here's a link I found from online. http://www.autoanything.com/exhausts...A2672A0A0.aspx

Spec_Davis

that magnaflow looks very clean n well made

yxc145

The reason MAGNAFLOW looks nice and clean is because it's not a pipe welded part. it's a Stamped part. how it is made is by stamping 2 flat plates in a shape of x, then weld the 2 plates together to form a "chamber" so you only see welding on the sides. There is no way a x pipe can look that "clean" if it was 2 or 4 pipes welded together.

I read in another x pipe thread (w211?) that these type of x pipe aren't really true X pipe, cause the "chamber" space doesn't create the scavenging effect. ok, don't ask me... i have no idea what that all means... I originally wanted to go with the Magnaflow one, but after reading that, i went and found something similar to the other type.
But i have to say... the magnaflow one sounds really good.

Azn_C300

learn something new ever day

FrankW

actually the inner is true x-pipe with smoother edge it only looks bulky outside. x-pipes with a narrow neck do more harm then good since you are basically choking the exhaust. personally I think they got the idea of going with bigger pipe i.e. loss of scavenging with the cross-piping confused

yxc145

Frank

did you feel a little more kick, more power than before? cause I really feel it with mine now. people said because the OEM resonator is unrestrictive, there should be no increase in power/torque. but i really do feel something. I really wish someone can do a dyno test and find out.

FrankW

the car pulls better at mid rpm after the x-pipe.

Petje

Only Dyno will prove, but in my opinion the original resonator shall not be much restrictive, BUT it is more restrictive than the X pipes, because it's a resonator and resonators are always a bit restrictive.

With the X-pipes you have more free flow, so thats better, but with the straight pipe you will have a better result, because you have less backpressure.

I have this from a website of a Dutch exhaust firm:

A good sport exhaust has therefore no backpressure and satisfies to the following characteristics:
A sufficiently large dia meter pipe (also not too large).
Less sharp turnings.
Durable material.

FrankW

OK fellows, I got the video from inside the car radio off and windows up for those that have asked how it sounds from inside the car. as I've described. it sounds stock inside the car other than when you are heavy on the throttle.

start the car, backing out of drive way, giving it some gas going up the hill. don't worry I've already warmed up the car. just wanted to show the sound from start to throttle.
http://www.youtube.com/watch?v=fVuxt3z_yX8

cruising at 70-75. picking up speed to 90. wind noise is louder than exhaust at cruising.
http://www.youtube.com/watch?v=qvu7pRA40OQ

FrankW

resonators are restrictive mainly because they are designed to disrupt the exhaust flow and absorb the sound with those little holes. the x-pipe has no holes to disrupt the flow.

Petje

True, but by the X-pipe the gasses from header 1 will meet the gasses from header 2 in the X, so it will disrupt a bit.... but that less than with the original resonator.

By the straight pipe the gasses will flow directly without a "meet and greet" in the X.

And only a dyno will prove which is better, the straight or the X pipe.

But both are better than the original i think...

FrankW

actually in dual exhaust setup you want the x-pipe to equalize the flow down both side. If you take a look at the stock resonator's on the 204 it looks like XX from the inside. The straight pipe will not work as well as the x-pipe.

on many cars people have seen more gains from x-pipe than straight in dual exhaust setups.

CarGuru

When you put the X-Pipe in do you remove the secondary or the twin cans up stream too or are those catalysts? No body has seemed to mention those or remove them. They seem to far down to be cats but what do I know?

-Ryan

speedye500

Just put my x pipe on today. here are my pics

FrankW

no touching the cats needed. you only need to remove the resonator which is aft the secondary catalysts.

CarGuru

Was it worth it.....


-Ryan

CarGuru

Ok so there are four cats, just checking.

-Ryan

LapazC350

what option did u get
2.25,2.50, or 3.00

angeloxnet

ya what size piping is the best? I heard too big, creates some kind of vaccum etc

yxc145

I just noticed in the pictures of the MAGNAFLOW x pipe, they are much shorter than the actual OEM resonator. Looks like they have to weld extra pipes on both ends to be able to replace and fit in the space.

I personally think it's better to get something that is CLOSE FIT. The one I got from Mendral Bending Solution is almost the same size as the resonator (overall length: 18.5" and width: 4.5"). I would suggest getting that instead of the Magnaflow one. And it's cheaper.

There is also a member currently working on getting a custom perfect fit x pipe with MBS, you can try talking to them to get that part made the same way. maybe they will sell it cheaper now that they have made one.

angeloxnet

I went to a local shop, and they said they will custom make one for me