Rear Motor Mount (RMM) General Discussion

[SilverRocket]

With so much of the discussion being scattered among the "What did you do to your car today" thread, I thought I'd kickstart a thread where we could specifically focus on the comparison between various RMMs.

Based on what I saw here and elsewhere on the internet, I pulled the trigger on the Wunderladen Steet version after reading and watching how it's only real fault is cold start/idle NVH. I'll report back when I get to drive with it but below is a table based off of users' posts.

	NVH (General)	NVH (Idle/Start)	NVH (Driving)	Wheel Hop	Shift Feel	On/Off Throttle Lurch
Stock (Baseline)	Good	Good	Good	Bad	Good	Noticeable
PRL	More	More	A bit more	Less	Better	Gone
Cobb	A bit more	A bit more	A bit more	Significantly less	Better	Gone
Wunderladen (Str)	A bit more	More	A bit more	Significantly less	Better	Gone

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[SilverRocket]

Quotes from users about their experiences:

I just swapped in the Cobb RMM replacing my PRL unit. It's definitely a bit quieter.

I was just looking up mentions of Unity, and came across this post

All is well still with the Wunderladen RMM? I still have the Street version on my FL5, it got rid of the on/off throttle lurching.

I will try out COBB in a few months as well since it’s received high praise from others so far

Love it! I read a ton of reviews before going with Wunderladen... It makes shifts feel crisper and I did not notice any real extra vibrations either. Glad I went with them and would do it again. Hopes this helps.

yes, there is definite increase in both vibration and noise. vibrations can be felt on cold starts, or just starts in general, or when moving from a stop (while slipping the clutch). during idle, it can be felt very slightly, nothing insane, but once you turn on the a/c, vibrations get a little more intense.

this decreases as the bushings settle in ~500 miles.

exhaust sounds a bit louder in the cabin when starting from a stop. paired with the AWE exhaust, it sounds very "growly" and aggressive.

I noticed there is more feedback from the steering wheel, which, in my opinion, is a VERY good thing. the steering is good in these cars, but its filtered too much, which makes sense. its an entry-luxury car. but coming from an RSX Type S, feedback from the ground/engine to your hands is always a good thing. gives the car more character, more rawness. I like it a lot. im also pretty sad it'll die down overtime lol

CONTEXT: PRL on a DE4

Installed the PRL RMM tonight. It adds a little vibration through the pedals, but it's minor. The 1-2 shift is smoother; the car has less wheel hop, and it has eliminated that "rubber-band" feeling when you first get on the throttle.

Installed the PRL RMM yesterday and was shocked at the relatively miniscule additional NVH it added, even with the AC on. I haven't noticed an annoying amount of extra vibration, I can just feel the engine a bit more. On and off throttle transition feels better and to some extent the clutch and shifter feel a bit better as well. A bit more feedback and it seems to go into gear a little better.

Love it! I read a ton of reviews before going with Wunderladen... It makes shifts feel crisper and I did not notice any real extra vibrations either. Glad I went with them and would do it again. Hopes this helps.

Heard the Wunderladen has lesser NVH than all the mounts but the same performance. Let us know how the COBB is!

I found the performance difference greater going from PRL --> Wunderladen than from OEM --> PRL. You won't find it any rougher than what you got on there now if PRL was fine for you (it was fine for me as well).

The Wunderladen is generally stiffer than the PRL - leading to an even more connected feeling to the car. The engine flex that used to occur on the 1-2 shift, while mitigated with PRL, is nearly non existent now. Aggressive throttle applications seem to be more responsive.

The added NVH was very marginal and occurs mostly during cold starts. Once I'm moving I don't really notice it at all.

Had both PRL and Wunderladen and strongly prefer the Wunderladen.

If you haven't yet purchased the motor mount, would suggest checking out wunderladen as well. I've recently switched over from PRL and find it much better on the performance end with only a marginal increase in NVH during idle.

 

[ken_teggy88]

Very useful, I'm looking to get a Wunderladen instead of PRL, let me know how bad the NVH is after the break-in!

 

[jedi03]

Unity is who suggested wunderladen over hasport to myself...am waiting till oem breaks before putting it on tho

 

[SilverRocket]

Unity is who suggested wunderladen over hasport to myself...am waiting till oem breaks before putting it on tho

Breaks? You'll be waiting a LOOOONG time, even if you consider getting worn out = breaking.

 

[optronix]

Yeah I haven't seen a broken motor mount in literally 30 years. I don't think I've EVER seen a Honda one break...

You guys have convinced me to get one. Guess it'll be Wunderladen.

 

[UWU-mancer]

Yeah I haven't seen a broken motor mount in literally 30 years. I don't think I've EVER seen a Honda one break...

You guys have convinced me to get one. Guess it'll be Wunderladen.

Damn. Yeah me too. Now when I think of it. Are they just stronger now?!

 

[SilverRocket]

Yeah I haven't seen a broken motor mount in literally 30 years. I don't think I've EVER seen a Honda one break...

You guys have convinced me to get one. Guess it'll be Wunderladen.

Still haven't seen a Wunderladen versus COBB comparison. I think I would have still gone Wunderladen anyway, don't think there's much of a difference between the two, however if I had to summarize based off of people's descriptions, the WL is probably a hair more performance oriented where COBB seems to be the king of minimal NVH.

 

[MNTeggy]

If you do only one mod to your car, the RMM is it. It seems to add power because you’re not losing as much of it, if that makes sense. Acceleration and shifts are better. I have PRL and haven’t tried the others.

 

[SilverRocket]

If you do only one mod to your car, the RMM is it. It seems to add power because you’re not losing as much of it, if that makes sense. Acceleration and shifts are better. I have PRL and haven’t tried the others.

I said I wasn't going to mod my car, that I was going to keep it 100% stock, however the widespread "OMG this makes the car so much better" got me to consider it.

Personally I don't consider it a mod, I view not much differently than changing the wheels to 18 inch lightweight aftermarket ones. Same can be said for aftermarket brake pads. Are you modding the car if you don't replace them with Honda OEM pads?

Either way, I look forward to reporting back in early April with my thoughts on the Wunderladen.

Other's opinions and reviews are more than welcome in the meantime.

 

[Unity Performance]

Great thread! I’m just getting back into mine after it spent a hundred days in winter storage. Went out for a 50-mile cruise yesterday, and while the Wunderladen Street RMM is still in break-in, there’s light vibration at idle. Doesn’t bother my spouse, that’s always a good thing

I’m going to switch to COBB in April so I can compare how it feels. I’ve already done the PRL to Wunderladen switch in my FK8, which improved shift feel greatly, and I felt a minor improvement in NVH.

I’ve had 27WON and Hasport in the FK8. Good performance but both exhibited more NVH than the 3 being addressed in this thread.

 

[mvkoto]

i just installed the prl one recently and i must say that the NVH that comes with the rmm is, imho, very much worth the gains you get. but take my opinion with a grain of salt because i used to drive a miata so my tolerance for nvh is probably higher than most. leaving a video link here to my installation and initial reaction to the new rmm:

also, it’s been a couple of weeks now, and i must say the nvh is negligible. as long as you’re not looking for a super luxury experience (which honestly buying an integra shouldn’t really be a super luxury thing lol), i think most people will love the prl.

 

[Unity Performance]

i just installed the prl one recently and i must say that the NVH that comes with the rmm is, imho, very much worth the gains you get. but take my opinion with a grain of salt because i used to drive a miata so my tolerance for nvh is probably higher than most. leaving a video link here to my installation and initial reaction to the new rmm:

also, it’s been a couple of weeks now, and i must say the nvh is negligible. as long as you’re not looking for a super luxury experience (which honestly buying an integra shouldn’t really be a super luxury thing lol), i think most people will love the prl.

It's not a bad mount, as we still have it on our FL1 and don't plan on changing it out. I just feel that it performs better with the 1.5T than it did with the 2.0T from my experience - could it be a weight thing, maybe power?

 

[mek]

Really thinking about considering adding one to my list of mods! With the vibration, is it just the steering wheel, pedals, and shifter or is it the whole car? I guess what im saying is can the passenger feel the vibration too? And where is the noise coming from? Sorry for all the questions lol. I usually take the family out for long road trips

 

[toasterap2]

Really thinking about considering adding one to my list of mods! With the vibration, is it just the steering wheel, pedals, and shifter or is it the whole car? I guess what im saying is can the passenger feel the vibration too? And where is the noise coming from? Sorry for all the questions lol. I usually take the family out for long road trips

everyones tolerance is going to vary, but imo its not bad. I put in a used PRL so it was probably already "broken in". Its a little worse with the a/c on, and you can feel a difference on cold start and stop n go traffic.

But the amount it reduces the drivetrain slop is so worth it. passengers probably wont notice it too much unless theyre particularly sensitive or also into cars (which in most cases theyd like it too). so far no complaints regarding NVH or vibrations from my passengers.

Most noise will be vibrations, more similar to older hondas (in a good way imo). youll feel it in the shifter but not to a point where its an issue, just normal engine rumble.

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