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      11-24-2012, 01:14 PM   #1
jrainlay
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RPI Exhaust

New RPI exhaust installed yesterday. Can't get enough of the sight or sound! Significant bonus in weight savings. Stock exhaust = 23 lbs per side, total weight 46 lbs. New RPI exhaust = 8 lbs per side, total weight = 16 lbs. Total weight reduction = 30 lbs. This product is very well built using high quality stainless and the tips sparkle like jewels! Low pitch, no raspiness and the drone is a small price to pay for aural perfection. Before/after sound clips to follow...
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      11-24-2012, 01:50 PM   #2
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I love my RPI's! They look great. After a couple hundred miles they start getting black, but some wet rags cleaned them out.
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      11-24-2012, 02:21 PM   #3
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Glad you like them. I'm glad I got mine too. Not too loud for me at all. I love the burbles when you get off the throttle

a clip of mine

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Last edited by dubsesd; 11-24-2012 at 03:08 PM.
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      11-25-2012, 12:26 AM   #4
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Looks like a familiar post from the Facebook page!! Still debating about exhaust myself John. Looking forward to hearing more!
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      11-25-2012, 12:47 AM   #5
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Cost?
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      11-25-2012, 03:47 AM   #6
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Send a message via ICQ to Z4-VILLA
around 900 ish new
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      11-25-2012, 11:59 AM   #7
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Compare these two images... The first is a dissected OEM (without fiber stuffing) that v3.2mc posted recently on the exhaust forum:

Contrast this with the RPI straight pipe design:

In addition to the 30 lb weight reduction, RPI claims a 7 HP gain, although I've never seen any before/after dyno results to substantiate this.
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      11-28-2012, 10:31 PM   #8
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Quote:
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around 900 ish new
Installed?
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      11-28-2012, 11:02 PM   #9
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Installation cost is minimal... About one hour.
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      11-29-2012, 04:53 AM   #10
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How are you liking them after a few days? Ears ringing yet?

A remedy for drone exhaustion, go find a long tunnel, drop down to 2nd in Sport mode, floor it! And then enjoy the pops and bangs when you sharply lift the pedal!
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      11-29-2012, 09:37 PM   #11
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Speaking of drone, I need to find that post with all the various video clips of the different exhaust set ups. I recall someone also posted db ratings for drone WOT, etc.
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      11-29-2012, 11:19 PM   #12
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Quote:
Originally Posted by strokeoluck View Post
Speaking of drone, I need to find that post with all the various video clips of the different exhaust set ups. I recall someone also posted db ratings for drone WOT, etc.
I thought I had that bookmarked but I can't find it. I've even tried Googling possible keywords and can't find it.
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      11-30-2012, 12:52 AM   #13
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Quote:
Originally Posted by strokeoluck View Post
Speaking of drone, I need to find that post with all the various video clips of the different exhaust set ups. I recall someone also posted db ratings for drone WOT, etc.
http://www.zpost.com/forums/showthread.php?t=680796
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      11-30-2012, 07:43 AM   #14
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Quote:
Originally Posted by ga41 View Post
How are you liking them after a few days? Ears ringing yet?

A remedy for drone exhaustion, go find a long tunnel, drop down to 2nd in Sport mode, floor it! And then enjoy the pops and bangs when you sharply lift the pedal!
I honestly don't know what all the fuss is about regarding drone. I love the RPI sound and am glad I went loud. If I had purchased one of the other systems instead, I think I would have always wondered if I would have liked the RPIs better. I figured i would start loud and if I didn't like the RPIs, I could always sell them and get the Stromungs. But sorry everyone... I won't be selling my RPIs!!!
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      11-30-2012, 08:54 AM   #15
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Appreciate the info and opinion on RPI. I'm still trying to decide what exhaust to go with in the spring (or earlier?), and RPI is looking pretty attractive. I also read some people say that just adding a magnaflow muffler did the trick too, for about $200.
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      11-30-2012, 08:55 AM   #16
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Quote:
Originally Posted by seank View Post
Thank you! I'm subscribed now.
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      11-30-2012, 09:22 AM   #17
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If only you could have the opition of no polished tips! M cars don't need them IMO.
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      11-30-2012, 09:32 AM   #18
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Quote:
Originally Posted by jrainlay View Post
I honestly don't know what all the fuss is about regarding drone. I love the RPI sound and am glad I went loud.
Do you think these are "wife approved?"
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      11-30-2012, 09:35 AM   #19
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Quote:
Originally Posted by strokeoluck View Post
Do you think these are "wife approved?"
Depends on the wife! My girlfriend tolerates it because she knows i like them..
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      11-30-2012, 10:34 AM   #20
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Quote:
Originally Posted by strokeoluck View Post
Do you think these are "wife approved?"
My wife absolutely approves... but then she rides a motorcycle and drives a truck!
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      12-01-2012, 07:22 AM   #21
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Quote:
Originally Posted by ga41 View Post
Depends on the wife! My girlfriend tolerates it because she knows i like them..
Same here thankfully.

I did find that after awhile of driving on the highway at a constant speed the drone was annoying. Driving around anywhere else where I'm shifting and having fun driving the sound just adds to the joy of the car.
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      11-17-2014, 04:03 PM   #22
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Does this exhaust affect the air/fuel of the car at all. Run lean? Any negative effect on the powerband or torque curve?
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