need help on muffler
12-22-2008, 04:06 PM
#1
Senior Members
Thread Starter
Join Date: Sep 2008
Location: Toronto, ON
Posts: 359
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2004 BMW 545i
I wanted to go the inexpensive route to change my muffler/exhaust. I do not have the $$$ to get a whole new exhaust and would like to change the stock muffler to a universal Mangaflow. Can some one help with the measurements?? Whats the size of the inlet? and would this enhance the sound a bit? is this a good idea? Going more for a better sound and the look of bigger tips in the back. Appreciate your feedback, thanks.
12-22-2008, 05:26 PM
#2
Former Vendor
Join Date: Oct 2006
Location: Anaheim, CA
Posts: 19,460
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: F13 M6
magnaflows give a sort of deeper rumbling sound. the inlet should be 2.25" - 2.5" wide. many have gone with just replacing the muffler, others with changing the piping as well and taking out a resonator(s) and others have gone with a quad exhaust set-up. for a single side, it usually comes down between the 14816 and 14862. PM sent. let me know if I can help with anything 
12-22-2008, 05:34 PM
#3
Senior Members
Join Date: Oct 2008
Location: B-Ham, AL
Posts: 1,185
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: '06 550i
'84 Nissan S12 Turbo
dumb question...but what do you do with the vac line that hooks up to that actuator on one of the outlets on the stock muffler....just plug it?
12-23-2008, 04:58 AM
#4
Senior Members
Thread Starter
Join Date: Sep 2008
Location: Toronto, ON
Posts: 359
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2004 BMW 545i
Thanks NerWeezy!! Def good Ideas............About taking out the resonator, would the sound be too loud? I just to enhance the sound and still look like a Luxury Sports car, ya know. I think I might go with just changing out the muffler and if I still want it louder, will remove the resonator.
What about the Vac Line that Ktlocklear is talking about, is that gonna be an issue? What do you do with that line? Thanks again guys......
What about the Vac Line that Ktlocklear is talking about, is that gonna be an issue? What do you do with that line? Thanks again guys......
12-23-2008, 08:27 AM
#6
Contributors
Join Date: Apr 2006
Location: Chester County PA
Posts: 295
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2007 550i, Mystic Blue over Auburn, 6-Manual, Sports, Premium, Cold Weather, Logic 7, Nav, Sirius, MTec Front & Sides with M5 rear apron, VIS Penta carbon fiber vented hood, OEM M166s, (or Style 101M with winter 19 Blizzaks), BMW Blue Calipers, Custom Quad Exhaust and M5 side grills, trunk finisher and spoiler. Rogue Octane SSK/WSR and Zeckhausen CDV, BMW illuminated shift knob, Delivered 4/26/06 - Ordered 3/18/06 from Otto's (the Best) BMW Dealership.
Another option is the driver's side M5 exhaust...
http://forums.e60.net/index.php?showtopic=...mp;#entry750379
Good luck. It's teh ebst mod you'll do I bet-
http://forums.e60.net/index.php?showtopic=...mp;#entry750379
Good luck. It's teh ebst mod you'll do I bet-
12-23-2008, 08:30 AM
#7
Contributors
Join Date: Apr 2006
Location: Chester County PA
Posts: 295
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2007 550i, Mystic Blue over Auburn, 6-Manual, Sports, Premium, Cold Weather, Logic 7, Nav, Sirius, MTec Front & Sides with M5 rear apron, VIS Penta carbon fiber vented hood, OEM M166s, (or Style 101M with winter 19 Blizzaks), BMW Blue Calipers, Custom Quad Exhaust and M5 side grills, trunk finisher and spoiler. Rogue Octane SSK/WSR and Zeckhausen CDV, BMW illuminated shift knob, Delivered 4/26/06 - Ordered 3/18/06 from Otto's (the Best) BMW Dealership.
Originally Posted by ktlocklear' post='750902' date='Dec 22 2008, 09:34 PM
dumb question...but what do you do with the vac line that hooks up to that actuator on one of the outlets on the stock muffler....just plug it?
12-23-2008, 10:16 AM
#8
Senior Members
Join Date: Oct 2008
Location: B-Ham, AL
Posts: 1,185
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: '06 550i
'84 Nissan S12 Turbo
Originally Posted by TAJARO' post='751345' date='Dec 23 2008, 11:30 AM
The vac line just opens the other side of the muffler at certain RPM. Below that point it's to create more bck pressure which some think helps torque and/or scavenging for fuel economy and emissions. Just unplug it, block the line and it's fine- no codes thrown and I've been in to the dealer for service with no comments/issues.
12-23-2008, 10:37 AM
#9
Contributors
Join Date: Jan 2008
Location: Miami
Posts: 1,212
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 05 545/6
Originally Posted by ktlocklear' post='751399' date='Dec 23 2008, 02:16 PM
Any gain's keeping it open all the time with the stock muff...or will it hurt performance?
Forcing it open gives an ever so slightly deeper rumble, but don't expect an aftermarket exhaust note.
12-23-2008, 11:01 AM
#10
Contributors
Join Date: Jul 2005
Location: Helsinki, Finland
Posts: 7,790
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.