RPI Exhaust Silencer!
08-09-2011 | 07:39 AM
#21
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Joined: Jan 2008
Posts: 94
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From: Denver
My Ride: 2005 545i
I'm in. I added an RPI to my 545 about 6 months ago. It sounds fantastic at WOT, but I'm completely sick of the drone at 1500-2000 RPM, and my wife all but refuses to ride in the car any more.
I was beginning to consider putting my stock exhaust back on, and then I read about the RPI silencer cones. I ordered two last night - I'll try one, then the other as well if I need it.
I don't care about losing the RPI power gain - the car is faster than it needs to be either way. What I want is the RPI exhaust tone, about 30% quieter.
I will report back.
I was beginning to consider putting my stock exhaust back on, and then I read about the RPI silencer cones. I ordered two last night - I'll try one, then the other as well if I need it.
I don't care about losing the RPI power gain - the car is faster than it needs to be either way. What I want is the RPI exhaust tone, about 30% quieter.
I will report back.
08-09-2011 | 09:22 AM
#22
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Joined: Oct 2007
Posts: 11,084
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From: Thousand Oaks, California
My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
I have the exhaust silencer on my RPI, and the sound is great, and I have NO drone whatsoever (and with only one silencer)! I'm positive that the silencer will SOLVE your droning issue and get your wife back into your car (if you truly want her there! 
) 
DO IT!! 
) DO IT!!
08-09-2011 | 03:59 PM
#24
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Joined: Oct 2007
Posts: 11,084
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From: Thousand Oaks, California
My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
The point I was trying to make is that the silencers DO work well! 
08-09-2011 | 04:13 PM
#26
Contributors
Joined: Oct 2007
Posts: 11,084
Likes: 0
From: Thousand Oaks, California
My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
08-09-2011 | 05:43 PM
#27
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Joined: Jan 2008
Posts: 94
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From: Denver
My Ride: 2005 545i
08-09-2011 | 09:04 PM
#28
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Joined: Jan 2010
Posts: 1,521
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From: Houston, TX
08-10-2011 | 07:20 AM
#30
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Joined: Jan 2008
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From: So. Cal (SFV)
My Ride: 2011.5 Alpine White E90 M3 | Black Novillo Leather | Carbon Fiber Leather Trim | ZCP | ZP2 | M-DCT | Navigation | Moonroof | 6FL Mods: TMS 12.5mm spacers all around l Hawk HPS Brake Pads l OEM M3 Edition Grills l Paint Matched Side Gills l Key Hole D
rpi silencer dyno on an e60 m5:
https://5series.net/forums/topic/876...1#entry1034264
I've read a few postings by rpipower/eloy stating the HP loss is minimal as shown on this dyno above. I highly doubt you will "feel" the slight loss in performance as no one's butt dyno is that sensitive IMO. The fact that the silencers can be installed and removed fairly easily makes this an option for those that want their exhaust a little quieter when they are DD'ing or hauling the family/friends/clients/etc..but on the weekends and/or for spirited driving you'd like a little more audible feedback
https://5series.net/forums/topic/876...1#entry1034264
I've read a few postings by rpipower/eloy stating the HP loss is minimal as shown on this dyno above. I highly doubt you will "feel" the slight loss in performance as no one's butt dyno is that sensitive IMO. The fact that the silencers can be installed and removed fairly easily makes this an option for those that want their exhaust a little quieter when they are DD'ing or hauling the family/friends/clients/etc..but on the weekends and/or for spirited driving you'd like a little more audible feedback