2003 X5 4.6is Exhaust Mufflers - Page 2

powers1 · #1 11-01-2009, 03:26 PM

Quote:

Originally Posted by al98

Well, I guees the 4.8is tips don't quite look the same as 4.6is. The above diagram is 2003 Nov production 4.8is.

The 4.8is are indeed a larger muffler but still "plug and play" on any 4.6is...!
Its a straight swap....

Tleong · #2 11-01-2009, 01:15 PM

I doubt you're going to get them for $350... I contacted the seller out of curiosity for his location. This is the message he sent me back
DC/MD/VA area. About 15 miles away from DC downtown. If you have friends here they may do a cash and carry deal. Otherwise just stop by my place and get it. I list this in bimmerfest dot com asking for $480. I consider any reasonable offer and may end this auction any time soon if someone makes a deal with me from that site. Where are you located by the way?

You might be able to haggle him down to $400.... but with shipping, you're looking at $500+ (Unless you're in the DC Area).

m5james · #3 11-01-2009, 04:33 PM

Larger doesn't necessarily mean better though. I've seen 540/740 stock mufflers cut in half and gutted, and I'm surprised how restrictive they are. The 4.8's could be more restrictive for off the line grunt due to the fact that they are larger and maybe have more chanmbers, so maybe 4.6 mufflers are better for midrange/hi-end power since they're smaller and potentially have less chambers....just guessing here. That's all i'm trying to figure out.

mrbmwx5 · #4 11-01-2009, 05:17 PM

Check out the sound clip .......my post #1
http://www.xoutpost.com/bmw-sav-foru...eo-inside.html

al98 · #5 11-02-2009, 09:14 PM

Quote:

Originally Posted by mrbmwx5

Check out the sound clip .......my post #1
http://www.xoutpost.com/bmw-sav-foru...eo-inside.html

WOW ... awsome sound! Like 2006 M5 v10, especially that low hum starting part. This is one of the most amazing mod I've ever seen. How could 4.6is/4.8is mufflers make a v6 sound so differently?! day and night. I believe you also got 6 or 8 hp gain! flow better.

dpgx5 · #6 11-01-2009, 06:39 PM

Would the 4.8is system fit a 4.4i? Just re-old&re-new, or is the piping diff?

Tleong · #7 11-01-2009, 06:50 PM

Quote:

Originally Posted by dpgx5

Would the 4.8is system fit a 4.4i? Just re-old&re-new, or is the piping diff?

I believe it would judging from past threads. I actually think someone did it before but couldn't find the thread.