Are there any gains in installing M5 exhaust on 545i
10-17-2007 | 12:19 PM
#1
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From: Potomac MD Usa
My Ride: 2004 BMW 545i
1999 BMW 740i (for sale currently)
1995 Euro BMW M5 3.8
1992 BMW 850i
1984 Euro BMW 635csi (for sale currently)
2002 MB C320 (for sale currently)
1998 MB 500SL
1984 Euro MB 500SEC AMG
1971 MB 280se 3.5 coupe
1993 Range Rover LWB (for sale currently)
1975 Fiat 124 Spider
Gang
Are there any advantages to installing M5 exhaust on a 545i as:
1) a single exhaust as replacement of the 545i's. Will it sound better? Perform better?
2) If I am crazy enough to relocate the battery, add an M5 pan etc..... will I get anything? Anyone has done it?
Obviously I am doing this for looks at the tail of an M5 looks considerably better... a compromise would be a single exhaust but with the LCI M-Tech tail.
Thanks for sharing experiences or facts!... (i.e. please no replies such as.. i think...... or it should.... as I am basing my decision of shelling $$$$$ todo this based on preferably factual replies.).
.
Thanks in advance!
Are there any advantages to installing M5 exhaust on a 545i as:
1) a single exhaust as replacement of the 545i's. Will it sound better? Perform better?
2) If I am crazy enough to relocate the battery, add an M5 pan etc..... will I get anything? Anyone has done it?
Obviously I am doing this for looks at the tail of an M5 looks considerably better... a compromise would be a single exhaust but with the LCI M-Tech tail.
Thanks for sharing experiences or facts!... (i.e. please no replies such as.. i think...... or it should.... as I am basing my decision of shelling $$$$$ todo this based on preferably factual replies.).
.Thanks in advance!
10-17-2007 | 12:23 PM
#2
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Members
Joined: Jan 2006
Posts: 98
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From: Potomac MD Usa
My Ride: 2004 BMW 545i
1999 BMW 740i (for sale currently)
1995 Euro BMW M5 3.8
1992 BMW 850i
1984 Euro BMW 635csi (for sale currently)
2002 MB C320 (for sale currently)
1998 MB 500SL
1984 Euro MB 500SEC AMG
1971 MB 280se 3.5 coupe
1993 Range Rover LWB (for sale currently)
1975 Fiat 124 Spider
Originally Posted by abdoul' post='482798' date='Oct 17 2007, 04:19 PM
Gang
Are there any advantages to installing an M5 exhaust on a 545i as:
1) a single exhaust as replacement of the 545i's. Will it sound better? Perform better?
2) If I am crazy enough to relocate the battery, add an M5 pan etc..... will I get anything? Anyone has done it?
Obviously I am doing this for looks at the tail of an M5 looks considerably better... a compromise would be a single exhaust but with the LCI M-Tech tail. BTW have you got part numbers? as the attached pic?
Thanks for sharing experiences or facts!... (i.e. please no replies such as.. i think...... or it should.... as I am basing my decision of shelling $$$$$ todo this based on preferably factual replies.)..
Thanks in advance!
Are there any advantages to installing an M5 exhaust on a 545i as:
1) a single exhaust as replacement of the 545i's. Will it sound better? Perform better?
2) If I am crazy enough to relocate the battery, add an M5 pan etc..... will I get anything? Anyone has done it?
Obviously I am doing this for looks at the tail of an M5 looks considerably better... a compromise would be a single exhaust but with the LCI M-Tech tail. BTW have you got part numbers? as the attached pic?
Thanks for sharing experiences or facts!... (i.e. please no replies such as.. i think...... or it should.... as I am basing my decision of shelling $$$$$ todo this based on preferably factual replies.).
.Thanks in advance!
10-17-2007 | 02:22 PM
#3
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My Ride: '05 545i - scheduled for ED pickup in Munich on 7/22!
Originally Posted by abdoul' post='482798' date='Oct 17 2007, 04:19 PM
Will it sound better? Perform better?
It won't perform better. If anything, performance will get worse. The M5 mufflers are designed for the flow from a high strung V10, with the majority of the engine's power coming from high rpms. It does this while sacrificing low end torque, so therefore not requiring that much backpressue from the exhaust. The 545 produces much of its power from low end torque, and pulling power leveling off near redline. It needs backpressure from the exhaust to do this, and I believe the M5 exhaust would not be able to provide this backpressue.
Do it if you like the sound, but you will be taking a risk with performance.
10-17-2007 | 02:45 PM
#4
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Joined: Apr 2005
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From: San Diego, CA
My Ride: 2007 E63 AMG | Obsidian Black | Schwarzes Nappa | Black BirdEye Maple | Premium II Package | Electronic Trunk Closer | Parktronic
Engine: RPi/Powerchips custom ECU tune, RPi Ram Air Kit (BMC filter, scoops), RennTech Sport exhaust, secondary cats, charcoal and resonator delete, custom AAA x-pipe
Exterior: 50% side windows / 35% rear window Formula One Pinnacle Series | Flat AMG hood emblem
Suspension: Renntech Lowering Module
Wheels/Tires: Radenergie R10, Falken FK452 245/30/20, Yokohama ADVAN Sport 285/25/20
-----------------------------------------
2005 545i Sport SMG | Ti Grau | Schwarzes Dakota | Anthracite Maple | Logic 7 | Nav
Engine: Custom AFE CAI, Superchips ECU remap, Sprint Booster, RDSport Dual Exhaust Conversion with Quad Pipes and X-pipe, 3 resonators deleted, 90mm tips!
Exterior: M-Tech Aero kit | M5 Mirrors | M5 Rear Bumper | Trunk Lid Finisher | Vorsteiner decklid spoiler | 50% Formula One Pinnacle Tint
Suspension and Brakes: Bilstein PSS9 coilovers, JBT BBK: 16" cross-drilled rotors, 8 piston and 15" cross-drilled rotors, 4 piston
Wheels: VIP Modular VR 02 20x9F, 20x10R | Toyo T1R 245/30/20F, 285/25/20R
Lights: PIAA 4150K Xtreme White Plus fog lights, AIB v3
MOST IMPORTANT: Hardwired V1; =)
ED Date: 4/7/05, Re-delivery date: 5/21/05
What proof that a M5 exhaust will rob you of power? Line up your 545i against ICEMAN 316's 550i with M5 Eisenmann Race exhaust. You'll walk him. 
10-17-2007 | 04:17 PM
#5
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My Ride: 545iSMGSilver GrayAuburn Dakota LeatherLogic 7 Premium SoundSports Package
Originally Posted by vegastrashed' post='482854' date='Oct 17 2007, 03:45 PM
What proof that a M5 exhaust will rob you of power? Line up your 545i against ICEMAN 316's 550i with M5 Eisenmann Race exhaust. You'll walk him.
HAhahaha thats only because he was leaking all over the place.
10-17-2007 | 04:38 PM
#6
Contributors
Joined: Apr 2005
Posts: 7,363
Likes: 1
From: San Diego, CA
My Ride: 2007 E63 AMG | Obsidian Black | Schwarzes Nappa | Black BirdEye Maple | Premium II Package | Electronic Trunk Closer | Parktronic
Engine: RPi/Powerchips custom ECU tune, RPi Ram Air Kit (BMC filter, scoops), RennTech Sport exhaust, secondary cats, charcoal and resonator delete, custom AAA x-pipe
Exterior: 50% side windows / 35% rear window Formula One Pinnacle Series | Flat AMG hood emblem
Suspension: Renntech Lowering Module
Wheels/Tires: Radenergie R10, Falken FK452 245/30/20, Yokohama ADVAN Sport 285/25/20
-----------------------------------------
2005 545i Sport SMG | Ti Grau | Schwarzes Dakota | Anthracite Maple | Logic 7 | Nav
Engine: Custom AFE CAI, Superchips ECU remap, Sprint Booster, RDSport Dual Exhaust Conversion with Quad Pipes and X-pipe, 3 resonators deleted, 90mm tips!
Exterior: M-Tech Aero kit | M5 Mirrors | M5 Rear Bumper | Trunk Lid Finisher | Vorsteiner decklid spoiler | 50% Formula One Pinnacle Tint
Suspension and Brakes: Bilstein PSS9 coilovers, JBT BBK: 16" cross-drilled rotors, 8 piston and 15" cross-drilled rotors, 4 piston
Wheels: VIP Modular VR 02 20x9F, 20x10R | Toyo T1R 245/30/20F, 285/25/20R
Lights: PIAA 4150K Xtreme White Plus fog lights, AIB v3
MOST IMPORTANT: Hardwired V1; =)
ED Date: 4/7/05, Re-delivery date: 5/21/05
Nah, when I beat him both times he never mentioned any leak, just that he was lacking backpressure.
10-17-2007 | 05:10 PM
#7
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Members
Joined: Jan 2006
Posts: 98
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From: Potomac MD Usa
My Ride: 2004 BMW 545i
1999 BMW 740i (for sale currently)
1995 Euro BMW M5 3.8
1992 BMW 850i
1984 Euro BMW 635csi (for sale currently)
2002 MB C320 (for sale currently)
1998 MB 500SL
1984 Euro MB 500SEC AMG
1971 MB 280se 3.5 coupe
1993 Range Rover LWB (for sale currently)
1975 Fiat 124 Spider
Thanks for the very informative reply. I was indeed intuitively fearing a performance loss re.. the back pressure.. .
I am glad I checked before!. Cheers!
.I am glad I checked before!. Cheers!
Originally Posted by jet190rs' post='482848' date='Oct 17 2007, 06:22 PM
It will sound different, not necessarily better. It depends on what you like. The M5 sounds more high pitched than the 545, so your car will have some of that rasp.
It won't perform better. If anything, performance will get worse. The M5 mufflers are designed for the flow from a high strung V10, with the majority of the engine's power coming from high rpms. It does this while sacrificing low end torque, so therefore not requiring that much backpressue from the exhaust. The 545 produces much of its power from low end torque, and pulling power leveling off near redline. It needs backpressure from the exhaust to do this, and I believe the M5 exhaust would not be able to provide this backpressue.
Do it if you like the sound, but you will be taking a risk with performance.
It won't perform better. If anything, performance will get worse. The M5 mufflers are designed for the flow from a high strung V10, with the majority of the engine's power coming from high rpms. It does this while sacrificing low end torque, so therefore not requiring that much backpressue from the exhaust. The 545 produces much of its power from low end torque, and pulling power leveling off near redline. It needs backpressure from the exhaust to do this, and I believe the M5 exhaust would not be able to provide this backpressue.
Do it if you like the sound, but you will be taking a risk with performance.
10-19-2007 | 06:22 PM
#9
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From: Queens, New York
My Ride: White w/ auburn interior, 2005 BMW 545i, with sport package, smg, navigation, head-up display, premium sound package, and cold weather package
so what exhaust would you recommend for a 545i to improve performance, single and/or quad? and what manufacturers?
10-19-2007 | 06:48 PM
#10
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We got one for you, in stock, 10hp dyno proven gains, with sound clips
Contact us at info@remusexhaustshop.com for the sound clips.
Contact us at info@remusexhaustshop.com for the sound clips.