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| 11-24-2012, 01:14 PM | #1 |
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Private First Class
 
Drives: 07 Z4 M Coupe Join Date: Dec 2011
Location: Scottsdale, AZ USA
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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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Mods: stubby, CF plate frame, CF spoiler, CF grills, aero skirts, reflector/lite deletes, CSLs, H&R coilovers & 12mm spacers, Rogue RSMs, RPI exhaust.
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| 11-24-2012, 02:21 PM | #3 |
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Lieutenant Colonel
 
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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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2006 ///M Coupe TiAg / IR -- H&R coilovers/RPI exhaust/ZHP knob/19" Morr vs8.2 hand brushed/Stoptech 355mm 6/4 BBK/Turner strut bar/polished diagonal braces/m tower caps/tekarbon 2x2 coil cover/Michelin PSS/gloss black kidneys/painted gloss black roof/mstache 2 front lip/AFE dry intake/RPI forced induction/colormatch corners/black chrome //M badges/rear diffuser/aeroskirts/rogue mounts/DKF adjustable hangers/22%tint/euromode lighting/LED interior & plate lighting
Last edited by dubsesd; 11-24-2012 at 03:08 PM. |
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| 11-25-2012, 11:59 AM | #7 |
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Private First Class
Drives: 07 Z4 M Coupe Join Date: Dec 2011
Location: Scottsdale, AZ USA
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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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Mods: stubby, CF plate frame, CF spoiler, CF grills, aero skirts, reflector/lite deletes, CSLs, H&R coilovers & 12mm spacers, Rogue RSMs, RPI exhaust.
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| 11-28-2012, 11:02 PM | #9 |
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Private First Class
Drives: 07 Z4 M Coupe Join Date: Dec 2011
Location: Scottsdale, AZ USA
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Installation cost is minimal... About one hour.
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Mods: stubby, CF plate frame, CF spoiler, CF grills, aero skirts, reflector/lite deletes, CSLs, H&R coilovers & 12mm spacers, Rogue RSMs, RPI exhaust.
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| 11-29-2012, 04:53 AM | #10 |
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First Lieutenant
 
Drives: Z4 M Coupe Join Date: Jun 2009
Location: Paphos
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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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Second Lieutenant
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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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(formerly SD 335is)
Drives: '06 Z4 M Rdstr | '11 335is E92 Join Date: Jan 2011
Location: San Diego, CA
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Quote:
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Mine: 2006 Z4
 Roadster | Interlagos Blue Metallic | Black Extended Nappa Leather | Carbon Leather Trim | Premium | Navigation | Heated Seats | iPod Adapter | Purchased 7/19/12Hers: 2011 335is Coupe | Le Mans Blue Metallic | Black Dakota Leather | Dark Glacier Aluminum | 6MT | Premium | Convenience | Heated Seats | Navigation | Harmon Kardon | iPod/USB | European Delivery 5/12/11  |
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| 11-30-2012, 12:52 AM | #13 | |
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enthusiast
Drives: e30 m3,e90 wagon,sprinter,z4m Join Date: Dec 2011
Location: sacramento, ca
Posts: 694
iTrader: (2)
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Quote:
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| 11-30-2012, 07:43 AM | #14 | |
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Private First Class
Drives: 07 Z4 M Coupe Join Date: Dec 2011
Location: Scottsdale, AZ USA
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Quote:
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Mods: stubby, CF plate frame, CF spoiler, CF grills, aero skirts, reflector/lite deletes, CSLs, H&R coilovers & 12mm spacers, Rogue RSMs, RPI exhaust.
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| 11-30-2012, 08:54 AM | #15 |
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Second Lieutenant
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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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Second Lieutenant
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Quote:
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| 11-30-2012, 09:22 AM | #17 |
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Lieutenant
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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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 Lone Star Chapter BMWCCA HPDE Event Chair & BMWCCA driving Instructor, Street Survival Instructor "Racing is important to men who do it well, Racing is.... life, anything that happens before or after is just waiting." - Steve McQueen (Le Mans) |
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| 11-30-2012, 09:32 AM | #18 | |
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Second Lieutenant
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Quote:
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| 11-30-2012, 09:35 AM | #19 | |
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First Lieutenant
Drives: Z4 M Coupe Join Date: Jun 2009
Location: Paphos
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Quote:
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| 11-30-2012, 10:34 AM | #20 | |
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Private First Class
Drives: 07 Z4 M Coupe Join Date: Dec 2011
Location: Scottsdale, AZ USA
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Quote:
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Mods: stubby, CF plate frame, CF spoiler, CF grills, aero skirts, reflector/lite deletes, CSLs, H&R coilovers & 12mm spacers, Rogue RSMs, RPI exhaust.
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| 12-01-2012, 07:22 AM | #21 | |
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Bimmer newbie
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Quote:
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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