Quad exhaust for 530I
08-02-2009, 08:48 PM
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My Ride: 2004 530I Black Saphire
Alright, so i think i have read just about every topic on quad exhausts for the 530i and other I6 cars. Have any of these products or custom setups been proven on a dyno to produce gains or at least maintain stock performance?
08-02-2009, 08:50 PM
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My Ride: 2008 Silverstone II E60 M5 2012 E70 AW X5 50i Sport w/ LCI Aero Kit and Rocker Panels
RPI makes one and there are proven gains. 
I believe member, praisethelowered, is selling his RPI exhaust he had on his 530 too.
I believe member, praisethelowered, is selling his RPI exhaust he had on his 530 too.
08-02-2009, 08:59 PM
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Originally Posted by C's Bimmer' post='963493' date='Aug 2 2009, 09:50 PM
RPI makes one and there are proven gains.
I believe member, praisethelowered, is selling his RPI exhaust he had on his 530 too.
I believe member, praisethelowered, is selling his RPI exhaust he had on his 530 too.
08-02-2009, 09:01 PM
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My Ride: 2008 Silverstone II E60 M5 2012 E70 AW X5 50i Sport w/ LCI Aero Kit and Rocker Panels
Originally Posted by 415BMW' post='963506' date='Aug 3 2009, 12:59 AM
The RPI exhaust isn't a quad though.
08-02-2009, 09:47 PM
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just get the rpi exhaust so you will gain perfomance, and use a set of dummy pipes you can have the exhaust shop weld on for you.
i'm sure rpi will sell you an extra pair of tips.
i'm sure rpi will sell you an extra pair of tips.
08-03-2009, 07:18 AM
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My Ride: 2004 530i
Model Year: 2004
Originally Posted by dbae1978' post='963564' date='Aug 3 2009, 01:47 AM
just get the rpi exhaust so you will gain perfomance, and use a set of dummy pipes you can have the exhaust shop weld on for you.
i'm sure rpi will sell you an extra pair of tips.
i'm sure rpi will sell you an extra pair of tips.
08-03-2009, 07:30 AM
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My Ride: 2004 530i
Model Year: 2004
Originally Posted by tex_phil' post='963842' date='Aug 3 2009, 11:22 AM
I've lost power with mine, I've been considering RPI replacing my magnaflow.
How bad was it? Can you feel it from the start? I guess my question is: how did you know?
08-03-2009, 09:46 AM
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Originally Posted by tex_phil' post='963842' date='Aug 3 2009, 08:22 AM
I've lost power with mine, I've been considering RPI replacing my magnaflow.
Is your magnaflow 2 inlet or 1 inlet? Are you thinking of replacing your magnaflow with RPI and leaving all other piping as you have it or were you thinking of going back to single sided exhaust?
08-03-2009, 10:19 AM
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My Ride: 04 525i, 04 Dinan M3
I have single inlet dual outlet, the dual outlet goes to each side of the exhaust. Its in place of the resonator. To be honest it may just be the weather with the heat causing it to feel sluggish sometimes. There has been 100+ degrees here for the last 2 months or so. I haven't had the exhaust in normal temperatures yet. I could swap out the RPI in the place of the magnaflow.