DONT NEED AN X PIPE
 

WHAT I DONT UNDERSTAND IS THE FAct that all of you guys are installing
an x pipe for the 4.4 (SPORT PACKAGE) THE 4.6 AND 4.8 THAT HAVE GOT AN ATTRACTIVE standart sound

can someone tell me why????

standard sound is so, i dunno, standard. it did have a nice sound, now it has a great sound. make a little more rumble, little deeper, and it kept me outta trouble for a Saturday. (actually two saturdays, i had some welding touch up)

it may be me, but i think it idles better too.

Well, there is a difference in the stock 4.8is sound vs. the x-piped 4.8is sound. One is nice and pleasant. Very middle of the road "sporty". Not too aggressive, but lets you know its there. The x-pipe mod turns this grocery getter/baby hauler into a aggressive kick ass sounding V8 mean machine. After the X-pipe install, my 4.8is sounds more aggressive than an E39 M5 and closer to the E60 M5. Very nice IMO.

:clueless:

:iagree: some of us like to mod. some of us like the sound of a v8 wide open.

After hearing that youtube video of the x-pipe and Dinan exhaust, I think I know what I want for X-mas!

Does the stock resonator that the x-pipe replaces have a crossover in it?

Not really, it is 2 perforated tubes straight through with all the stuffing/baffling around them. So they're not fully separated but not fully connected.

Ok, so there is some pressure stabilization between cylinder banks. The reason I was asking was because I've heard straight pipes (no crossover) is actually louder than with a crossover. Heard any x5s with a straight pipe mod as opposed to x pipe?

Yeah, pretty much mine :D I don't have straight pipes but short resonators like in the writeup article by DanDe. Here's the link ti the article that first drew mw to X5world as I knew the exhaust was going to be one of the first mods I'd do.

The only thing I don't like is the left, right, left, right pulsation from the rear due to the firing order. It is smoothed out with the x-pipe, but more raspy with the straight throughs. I plan to replace the internal x center from magnaflow and swap the rear section of pipes with some 2.5" and replace the mufflers with either some flowmasters or magnaflows, adding back the 4.6is style tips. I want a deep, low tone with a decently loud and smooth delivery.

Required by law here, my car is due for an inspection on yearly basis.

Does any one know if having the X-Pipe breaks any major rules and regulations? I don't have the details of the staff that they check, but it should be pretty close to the UK standard.

Also, I've seen a lot of discussions on the Magna X-pipe, Hargte.. etc. Will there be any big difference in terms of the results and prices?

:iagree:

go check out some sound clips and hear the difference.

but in the end if its the stock sound you want.. then to each his own.

I agree with the majority here so far on the sound difference between a stock V8 and a V8 with an X-pipe. There is also a suibstantial difference between a stock 4.8is sound and my 4.4i, even though both are V8's. I was at the dealer a while back and a 4.8is started up and lets just say it made me pay more attention than mine does. Also, it may just be my X, but it seems to me that I hear more engine noise/whine than exhaust sound. The X-pipe makes all the difference from the sound clips I have heard. I hope to do this mod soon, personally.

Anything after the cats is usually fair game as long as you don't exceed the noise limit.

Differences in the x-pipes, results difference none to minimum, price a huge difference. Magnaflow can be had for around $200 installed and the Hartage I believe is around $1,000.

Thanks. I love the way it sounds when i take off and shift through the gears. It also sounds goou driving at 2.5K and 3K RPM's