RPI Installed (08 550i Sport/Manual)
03-01-2010 | 05:56 PM
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From: Philly Burbs
My Ride: 08 550i, 6 Speed Manual w/Sport Pkg, Black
RPI Exhaust, Turner 15mm Rear Spacers, 20% Tint
First day with the new RPI.
Must say that I had my "concerns".
At hwy speed it's nearly silent.
WOT is flat out fun - sounds really good.
it does drone a bit at low RPM's (sub 2000k) when holding that speed.
However, I have heard people claim that after a few thousand miles - it softens down a bit.
I can tell an increase in HP but only at high RPM's.
Overall - I'm stoked. It's great to hear the V8.
I'm going to do the Dinan Intake next (perhaps with the chip).
Will pull a dyno to see what it really did for increased power.
Next mod: M5 Rear Deck Lid
Fun car - still hate the throttle responce feel.
Wish this car had a "sport mode" for manuals like my E46 M3 did.
Chow (for now)
Must say that I had my "concerns".
At hwy speed it's nearly silent.
WOT is flat out fun - sounds really good.
it does drone a bit at low RPM's (sub 2000k) when holding that speed.
However, I have heard people claim that after a few thousand miles - it softens down a bit.
I can tell an increase in HP but only at high RPM's.
Overall - I'm stoked. It's great to hear the V8.
I'm going to do the Dinan Intake next (perhaps with the chip).
Will pull a dyno to see what it really did for increased power.
Next mod: M5 Rear Deck Lid
Fun car - still hate the throttle responce feel.
Wish this car had a "sport mode" for manuals like my E46 M3 did.
Chow (for now)
03-01-2010 | 06:22 PM
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From: Fort Lauderdale, FL
My Ride: 2006 550i | Silver-Grey- A08 | Premium - Sport Package | Adaptive Headlights | Logic 7 w/ CD Changer | Bluetooth | Park Distance Control | Xenon Headlights | Comfort Access [s]Sprint Booster V1[/s] | K&N filter - Stock Box w/ Charcoal Filter Removed | Clear Side LED Markers | Matte Black Grilles | RPI Air Scoop | RPI 550i GT Exhaust | 12" Kicker w/ AMP | Headlight Euro Overlays | ACS Rep Roof\Trunk Spoilers |MTEC V2 Angel Eyes | 6000k HID Fog Lights | 19" VMR v710 Stag Wheels | Hankook Ventus V12 Evo K110 Tires | Debadged | LED Courtesy Door Lamps | Sprint Booster V2 | Painted Calipers | M pedals\shift knob | HID License Plate Bulbs | R1 Drilled\Slotted Rotors | Hawk HPS Brakes| ACS replica front lip |
Yes, Welcome.
03-01-2010 | 11:27 PM
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From: West LA
My Ride: 2005 BMW 545i
RPI or bust! I love my exhaust, really put the V8 sound and feel where it should.
I don't have any throttle lag on my 545i, 6-speed. I replaced the CDV with the Zeckhusen drilled one and it made a significant difference. I do also have a speed innovation chip/tune (bought my car with it) so I'm not sure which item cleared my throttle lag or if it's a combination of both.
Welcome and enjoy the exhaust!
I don't have any throttle lag on my 545i, 6-speed. I replaced the CDV with the Zeckhusen drilled one and it made a significant difference. I do also have a speed innovation chip/tune (bought my car with it) so I'm not sure which item cleared my throttle lag or if it's a combination of both.
Welcome and enjoy the exhaust!
03-02-2010 | 04:41 AM
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From: new york
My Ride: 2011, E90 M3 Sedan. Alpine White.Competition package, Keyhole cover, fender reflectors in Alpine white, RPI Exhaust, 19
If you get the sprintbooster you wont feel the throttle lag anymore, especially with the RPI.. welcome to the RPI family 
03-02-2010 | 05:45 AM
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From: Harrisburg, PA area
My Ride: SOLD...Jet Black 2008 550i M Sport with SAT, black interior. RPI exhaust and air scoop, 35% huper optik tint all around, CF roundels, flat black kidneys, Springfield Armory XD-40 jet black in glove box, charcoal filter removed.
RPI or bust! I love my exhaust, really put the V8 sound and feel where it should.
I don't have any throttle lag on my 545i, 6-speed. I replaced the CDV with the Zeckhusen drilled one and it made a significant difference. I do also have a speed innovation chip/tune (bought my car with it) so I'm not sure which item cleared my throttle lag or if it's a combination of both.
Welcome and enjoy the exhaust!
I don't have any throttle lag on my 545i, 6-speed. I replaced the CDV with the Zeckhusen drilled one and it made a significant difference. I do also have a speed innovation chip/tune (bought my car with it) so I'm not sure which item cleared my throttle lag or if it's a combination of both.
Welcome and enjoy the exhaust!
03-02-2010 | 06:05 AM
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From: Miami, FL
My Ride: M5
Model Year: 2013
Engine: S63
03-02-2010 | 06:43 AM
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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
03-02-2010 | 09:24 AM
#10
RPI or bust! I love my exhaust, really put the V8 sound and feel where it should.
I don't have any throttle lag on my 545i, 6-speed. I replaced the CDV with the Zeckhusen drilled one and it made a significant difference. I do also have a speed innovation chip/tune (bought my car with it) so I'm not sure which item cleared my throttle lag or if it's a combination of both.
Welcome and enjoy the exhaust!
I don't have any throttle lag on my 545i, 6-speed. I replaced the CDV with the Zeckhusen drilled one and it made a significant difference. I do also have a speed innovation chip/tune (bought my car with it) so I'm not sure which item cleared my throttle lag or if it's a combination of both.
Welcome and enjoy the exhaust!
The sprintbooster and the Dinan software will cure the throttle response issues mentioned in the OP, and the intake will increase power and give a bit of intake roar to go along with the RPI exhaust roar!