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Seriously considering the RPI Exhaust
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- Member
- Posts: 108
- Joined: Sat Aug 31, 2019 2:06 pm
Seriously considering the RPI Exhaust
Only had the Z4M Roadster a week but already starting to get quite a list of things that I want to do to bring it back to all its glory including
New badges all round
Refurb/replace alloys
Replace drivers cup holder as arm broke
But although I love the sound, I just feel it needs more especially as it’s not a daily. From all the videos and write ups I’m pretty sure it’s the RPI exhaust I’m looking for, especially as it seems to just turn the same sound up to 11 or even 12 whereas a lot of the others seem to totally change the sound which I don’t want.
Does anyone have the RPI installed and your thoughts, also I may look to go the evolve carbon intake at some point so interested if anyone’s gone down that route as well.
New badges all round
Refurb/replace alloys
Replace drivers cup holder as arm broke
But although I love the sound, I just feel it needs more especially as it’s not a daily. From all the videos and write ups I’m pretty sure it’s the RPI exhaust I’m looking for, especially as it seems to just turn the same sound up to 11 or even 12 whereas a lot of the others seem to totally change the sound which I don’t want.
Does anyone have the RPI installed and your thoughts, also I may look to go the evolve carbon intake at some point so interested if anyone’s gone down that route as well.
--- Currently - 2007 Z4MR
--- Previous BMWs - Z4 M40i First Edition, Z4 2.5i Sport, 430d xdrive Coupe, 330i Coupe, 525i, 540i, Z4 2.5i, 330ci Convertible, Z3
--- Plus over 40 non BMWs inc. S2000, Focus ST, Octavia VRS, RS3, MINI JCW
--- Previous BMWs - Z4 M40i First Edition, Z4 2.5i Sport, 430d xdrive Coupe, 330i Coupe, 525i, 540i, Z4 2.5i, 330ci Convertible, Z3
--- Plus over 40 non BMWs inc. S2000, Focus ST, Octavia VRS, RS3, MINI JCW
- -Tom-
- Senior Member
- Posts: 2950
- Joined: Tue Nov 27, 2012 10:03 pm
- Location: Bath
Seriously considering the RPI Exhaust
I can’t comment on rpi, but I went down the route of supersprint race. Like you, it’s not a daily and for me it totally transformed the car. I couldn’t have it as a daily, but for its use, it’s how it should be for me!
-Z4 M Coupe, Silver Grey, Imola Red Nappa, carbon leather, CSLs, SuperSprint Race, Track Mode Enabled
-Tesla M3 LR
Previous - 3.0 si sport roadster, Silver Grey with Oregon Pearl Grey leather, Piano black, EIbach Pro, Stubby
-Tesla M3 LR
Previous - 3.0 si sport roadster, Silver Grey with Oregon Pearl Grey leather, Piano black, EIbach Pro, Stubby
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- Member
- Posts: 108
- Joined: Sat Aug 31, 2019 2:06 pm
Seriously considering the RPI Exhaust
Thanks Tom, a little reassurance I’m not mad
--- Currently - 2007 Z4MR
--- Previous BMWs - Z4 M40i First Edition, Z4 2.5i Sport, 430d xdrive Coupe, 330i Coupe, 525i, 540i, Z4 2.5i, 330ci Convertible, Z3
--- Plus over 40 non BMWs inc. S2000, Focus ST, Octavia VRS, RS3, MINI JCW
--- Previous BMWs - Z4 M40i First Edition, Z4 2.5i Sport, 430d xdrive Coupe, 330i Coupe, 525i, 540i, Z4 2.5i, 330ci Convertible, Z3
--- Plus over 40 non BMWs inc. S2000, Focus ST, Octavia VRS, RS3, MINI JCW
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- Lifer
- Posts: 11025
- Joined: Tue Feb 10, 2015 10:27 pm
Seriously considering the RPI Exhaust
Just a cheeky nudge Andy, I have a pair of mint Supersprint back boxes if you’re interested at any point.
M roady...OEM CSL’s, strut brace, Remus back boxes, ZHP
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
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- Member
- Posts: 125
- Joined: Sat Aug 25, 2012 9:18 pm
Seriously considering the RPI Exhaust
I too am the same as you!
Recently picked up a Z4MR and it’s a weekend toy and want to replace the exhaust and the RPI is certainly a consideration!
Recently picked up a Z4MR and it’s a weekend toy and want to replace the exhaust and the RPI is certainly a consideration!
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- Member
- Posts: 108
- Joined: Sat Aug 31, 2019 2:06 pm
Seriously considering the RPI Exhaust
This guy has a few YouTube videos with the RPI as well as the Evolve Air Box on some later vids. Just so difficult to gauge how loud it is in real life
https://youtu.be/8i0RLro4Hmw
--- Currently - 2007 Z4MR
--- Previous BMWs - Z4 M40i First Edition, Z4 2.5i Sport, 430d xdrive Coupe, 330i Coupe, 525i, 540i, Z4 2.5i, 330ci Convertible, Z3
--- Plus over 40 non BMWs inc. S2000, Focus ST, Octavia VRS, RS3, MINI JCW
--- Previous BMWs - Z4 M40i First Edition, Z4 2.5i Sport, 430d xdrive Coupe, 330i Coupe, 525i, 540i, Z4 2.5i, 330ci Convertible, Z3
--- Plus over 40 non BMWs inc. S2000, Focus ST, Octavia VRS, RS3, MINI JCW
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- Member
- Posts: 125
- Joined: Sat Aug 25, 2012 9:18 pm
Seriously considering the RPI Exhaust
Watched a few of his YouTube videos and in fact the reason I really want the evolve airbox!!
- Beedub
- Lifer
- Posts: 10973
- Joined: Wed Sep 10, 2008 2:25 pm
- Location: Sutton Coldfield
Seriously considering the RPI Exhaust
first 30 seconds then my son started to cry so had to slow down this car frightens him.
https://youtu.be/VZhzGCNpUrg
RPI, love and hate relationship.... sound awesome!! but sadly ..... in some ways they are that loud that driving the car is often a pain... plus EVERYONE looks at you. I love the weight savings they offer.
https://youtu.be/VZhzGCNpUrg
RPI, love and hate relationship.... sound awesome!! but sadly ..... in some ways they are that loud that driving the car is often a pain... plus EVERYONE looks at you. I love the weight savings they offer.
Last edited by Beedub on Tue Jul 13, 2021 5:22 pm, edited 1 time in total.
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- Mr Tidy
- Legend
- Posts: 23608
- Joined: Wed Jul 02, 2014 12:18 pm
- Location: North West Surrey
Seriously considering the RPI Exhaust
I don't know anything about the RPI but when I bought my MC it had Powerflow back boxes already fitted, and they up the volume just enough for me. Plus the tailpies are a bit larger so they fill the spaces in the bumper a bit better! There is a bit of drone around 2,000 rpm but as that's typically around 50mph in 6th it's easy enough to drive around when it starts to get annoying.
I have wondered about other intakes like Gruppe M, Eventuri, etc. but I wouldn't want intake volume to drown out the exhaust, so I'll stick with what I have. If the intake did dominate the exhaust it would be an expensive mistake!
Now we are allowed out and about a bit more it would be ideal if you could find a forum member who has one or other of those alternatives fitted as a video is no substitute for 1st hand expereince.
Anyway I hope you find a solution you like.
I have wondered about other intakes like Gruppe M, Eventuri, etc. but I wouldn't want intake volume to drown out the exhaust, so I'll stick with what I have. If the intake did dominate the exhaust it would be an expensive mistake!
Now we are allowed out and about a bit more it would be ideal if you could find a forum member who has one or other of those alternatives fitted as a video is no substitute for 1st hand expereince.
Anyway I hope you find a solution you like.
Coupes because stunning!
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
Current - Silver Grey MC, Imola Red heated Nappa & carbon trim. Aeros, H & R Coil-overs, 224s, OE Strut brace, Nav, cup-holders, DSP Hi-Fi, pdc, cruise, MFSW, no CDV! E90 330i daily
Gone - Montego Blue
Gone - Ruby Black
- ga41
- Senior Member
- Posts: 2898
- Joined: Sun Feb 03, 2008 5:38 am
- Location: Paphos
Seriously considering the RPI Exhaust
I too have the RPI's. It's certainly divisive. They are amazeballs when you're on it on some deserted B road but annoying as f**k when you're on a motorway cruising
If you have the chance to hear them live then I would definitely urge you to do so. They really are on another level compared to stock....
If you have the chance to hear them live then I would definitely urge you to do so. They really are on another level compared to stock....
-- http://www.freerice.com/ For each answer you get right, they will donate 10 grains of rice to the United Nations World Food Program --
- AndyBeech
- Senior Member
- Posts: 1623
- Joined: Mon Feb 18, 2013 2:25 pm
- Location: Reading / Bath
Seriously considering the RPI Exhaust
Intake noise on these car's is so much better than any exhaust noise you can get on them IMO. I've still yet to hear an S54 exhaust video that actually sounded particularly good to me, intake on the other hand
I would go for a carbon airbox and save your money on the exhaust, will sound far more exotic
I would go for a carbon airbox and save your money on the exhaust, will sound far more exotic
Z4MR - Gruppe M, Bilstein PSS10, CSL's + 18" CSL reps with semi's, RTAB Limiters, Powerflex’d, PF Camber Arms, K-Sport BBK / RSL-29, GC Camber Plates, Strut Brace, Exhaust valves, custom brake cooling, complete underside refresh!
- Iggy
- Member
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- Location: Surrey
Seriously considering the RPI Exhaust
There's an M roadster with an RPI near where i live and every time it drives past you have to stop your conversation and wait for it to go... it's that loud. Each to their own of course but it doesn't sound good to my ears, at least not from the outside.
I've got a Gruppe M and have to agree with Andy - the intake noise is sublime and, for me, is far more emotive than exhaust sound. I'm actually glad the stock back box is so quite so it doesn't interfere with the intake noise . If i were to consider an aftermarket back box it would probably be a Powervalve BCS just because it tries to limit the noise until you really go for it, apparently with less drone at motorway speeds (they claim no drone).
I've got a Gruppe M and have to agree with Andy - the intake noise is sublime and, for me, is far more emotive than exhaust sound. I'm actually glad the stock back box is so quite so it doesn't interfere with the intake noise . If i were to consider an aftermarket back box it would probably be a Powervalve BCS just because it tries to limit the noise until you really go for it, apparently with less drone at motorway speeds (they claim no drone).
zedless
Past
'06 Z4 3.0si Sport Coupe - Silbergrau
'06 Z4MC - Silbergrau & Imola Leather
Past
'06 Z4 3.0si Sport Coupe - Silbergrau
'06 Z4MC - Silbergrau & Imola Leather
- ga41
- Senior Member
- Posts: 2898
- Joined: Sun Feb 03, 2008 5:38 am
- Location: Paphos
Seriously considering the RPI Exhaust
I dare anyone to briskly drive a Z4M with RPIs up a twisty mountain road and not giggle like an idiot when you first downshift and put the pedal to the metal. I've had mine for 10 years now and I still smile every single time.
Again, it's 100% NOT for everyone! But when it works it works really well
Again, it's 100% NOT for everyone! But when it works it works really well
-- http://www.freerice.com/ For each answer you get right, they will donate 10 grains of rice to the United Nations World Food Program --
- Iggy
- Member
- Posts: 218
- Joined: Mon Jul 03, 2017 12:13 am
- Location: Surrey
Seriously considering the RPI Exhaust
If i had access to twisty mountain roads i might change my opinionga41 wrote: ↑Mon Jul 12, 2021 9:55 am I dare anyone to briskly drive a Z4M with RPIs up a twisty mountain road and not giggle like an idiot when you first downshift and put the pedal to the metal. I've had mine for 10 years now and I still smile every single time.
Again, it's 100% NOT for everyone! But when it works it works really well
However, driving around where i live i might get chased by angry farmers an locals with pitchforks
zedless
Past
'06 Z4 3.0si Sport Coupe - Silbergrau
'06 Z4MC - Silbergrau & Imola Leather
Past
'06 Z4 3.0si Sport Coupe - Silbergrau
'06 Z4MC - Silbergrau & Imola Leather
- Bombardino
- Member
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- Joined: Mon Aug 03, 2015 8:57 am
- Location: North Shropshire
Seriously considering the RPI Exhaust
As mentioned by Iggy Powervalve come highly rated, It just so happens I have a set in my garage if your interested.