B&B Exhaust
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Joined: Oct 2006
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From: Anaheim, CA
My Ride: F13 M6
Originally Posted by vegastrashed' post='376153' date='Jan 9 2007, 09:29 PM
The best comment I heard about the PCH cruise Saturday was from Trevor. He was absolutely loving hearing the V8s growling all around him.
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Joined: Apr 2005
Posts: 7,363
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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
So, why can't Dinan's 545i exhaust fit the 550i? B&B exhaust works just fine on either car. 
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Joined: Aug 2005
Posts: 11,432
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From: San Jose, CA
My Ride: E60 M5, F85 X5M
I'm sure you can make it fit. I mean if you really wanted to, you can fit any muffler as long as it's small enough and you use the right size piping. The problem is that it's not "tuned" to that specific car.
I remember trying to get the Remus universal muffler that has carbon fiber tips but they recommended against that. Even though it's a "universal" muffler.
I remember trying to get the Remus universal muffler that has carbon fiber tips but they recommended against that. Even though it's a "universal" muffler.
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Joined: Aug 2004
Posts: 4,979
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From: SJC/CA/US
Dinan exhaust is just a through pipe from resonator to the dual exhaust tip. It means that if you use a toilet snake with a 3.5" diameter (I know it never exists) and running from the exhaust tip, it'll go all the way from the tip to the resonator.
Muffler is stuffed with some sound damping material.
This means that both 545 and 550 can use the same Dinan exhaust. The only thing different is pipe diameter and the angle that Dinan exhaust pipe run.
For 545 and 550, exhaust pipe angle are different, so I think, that's why Dinan needs my car to make an exhaust for 550i. With 545 Dinan exhaust mouting on 550, it'd take 2 to 3hrs time to bend and fit it onto 550i. Now they develop new exhaust that's plug and play which takes only 40 min to install. This cut their labor dramatically.
Like I mentioned before, all aftermarket exhaust alter BMW's torque and power curves. It increases top end hp but takes away low end torque due to absence of back pressure at low rpm.
Muffler is stuffed with some sound damping material.
This means that both 545 and 550 can use the same Dinan exhaust. The only thing different is pipe diameter and the angle that Dinan exhaust pipe run.
For 545 and 550, exhaust pipe angle are different, so I think, that's why Dinan needs my car to make an exhaust for 550i. With 545 Dinan exhaust mouting on 550, it'd take 2 to 3hrs time to bend and fit it onto 550i. Now they develop new exhaust that's plug and play which takes only 40 min to install. This cut their labor dramatically.
Like I mentioned before, all aftermarket exhaust alter BMW's torque and power curves. It increases top end hp but takes away low end torque due to absence of back pressure at low rpm.
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
Is there any aftermarket exhaust that won't cause a loss of low-end torque? Is there a way to modify existing stock 545/550 exhaust to a quad? Or will modifying stock also cause a loss of torque? No mention of RD Sport! Too much $$$ 
Thread Starter
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Joined: Sep 2005
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From: NJ (EXIT 4), SUMMERS IN GREECE
My Ride: 2006 550 SMG
Originally Posted by vegastrashed' post='376036' date='Jan 9 2007, 08:23 PM
I know that brian1225 fitted the B&B exhaust for a 545 on his 550. The exhaust system is the same for both cars. My opinion and shared by others is that with most aftermarket exhaust systems you will lose some low-end torque but gain top-end hp. Is that a fair trade-off for you?
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Joined: Jul 2004
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From: expat in The Netherlands
My Ride: BMW 545iA Black Sapphire
Model Year: 2005
Engine: 545i
Originally Posted by vegastrashed' post='376175' date='Jan 10 2007, 06:56 AM
Is there any aftermarket exhaust that won't cause a loss of low-end torque?
By using small round cannisters (compared to stock) there will be an increase in V8 rumble...
I'm considering this one seriously. Comes in 76mm or 83mm versions (order no. B5256.00760)
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Joined: Aug 2004
Posts: 4,979
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From: SJC/CA/US
This is great, Andy. I wish I can hear it in person how it sounds when starting up and during crusing. Quad exhaust would be a real challenge. I'm not sure if there is any aftermarket exhaust has flapper feature. If it does, it would double the cost of Eisenman as Andy showed above.
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Joined: Aug 2005
Posts: 11,432
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From: San Jose, CA
My Ride: E60 M5, F85 X5M
I like the looks of the Eisenmann. I actually like the look of most other aftermarket exhaust mufflers over the Dinan believe it or not. Their muffler looks shitty to me. haha