Cobb rear motor mount

[lando]

Anyone have the Cobb RMM for the FL5? Been looking at upgrading the RMM to get rid of some of the wheel hop. I know a lot of RMM will cause some NVH. Trying to find the best of both worlds. Least amount of NVH, while stopping wheel hop. I know quite a few people are running the PRL RMM, along with some others.

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[Chilly613]

Dont have a Cobb, but posted my PRL RMM for sale the other day.

https://www.civicxi.com/forum/threads/fs-prl-rmm.63428/


EDIT: Never mind, someone just bought it.

 

[jcb]

I have the PRL one and I like it quite a bit....it is "just right" as I use the car every day but like to "feel" the car. It is all I personally need....for a street car.

I like the fact that the materials PRL used were such that the thing should outlast the car....that sort of engineering appeals to me. Not sure how the COBB is made, but they make great stuff too. You cannot lose here. The only time I notice it is at start up with clutch up and a/c on and if the RPMs are over 4k (in a good way).

 

[Unity Performance]

We have a couple of customer reviews for it so far, and I’ll ask another FL5 friend and customer who hasn’t yet left a review to perhaps chime in on this thread.

I have one waiting to go on my car after I do at least 600 miles on my Wunderladen Street RMM first.

 

[Jack90210]

I have one waiting to go in, just waiting to get another project out of my garage first.

By the reviews that I saw, it seems to be the "best of both worlds" option that you're describing.

 

[rwong324]

I spent some time researching several rear motor mount options including Hardrace, PRL Motorsports, Wunderladen Racing, 27WON Performance, and COBB Tuning. By nature of the modification, all of these mounts aim to achieve similar goals: reducing drivetrain slop, minimizing wheel hop, improving power transfer, and making shifts feel more direct and engaging. The real differentiator tends to come down to NVH tolerance and how much an individual driver is comfortable with. Some people actually prefer a bit of NVH since it adds to the more aggressive, connected driving feel.

What drew me to the COBB mount specifically was the dual-durometer bushing design. The split-spoke construction also stood out to me since it may help with vibration reduction and heat management. On this platform, the rear motor mount sits very close to the front pipe, which is a major source of heat transfer. My understanding is that better heat control can help maintain more consistent bushing performance over time since excessive heat can soften or degrade the material.

COBB advertises little to no NVH after a break-in period of around 200 miles, which was another reason I decided to give it a try. I also heard very positive feedback about the Wunderladen mount, which similarly uses a dual-durometer approach.

Upon initial startup after installation, there was a noticeable increase in NVH inside the cabin. However, as I’ve continued to put miles on the car, that has gradually subsided. Under normal driving conditions, the car now feels smoother yet more connected to the drivetrain. Shifts feel crisper and more direct, and side-to-side shifter movement feels slightly tighter. The car also seems to put power down more efficiently, with reduced drivetrain loss and noticeably less delay between shifts.

From a performance standpoint, the mount checks all the boxes I was hoping for. Based on how the NVH has continued to settle, I’m confident it will end up feeling very close to OEM levels once fully broken in.

A friend of mine who lives near COBB’s headquarters had the opportunity to ride in their development car, which is well past the break-in period. According to him, NVH was barely noticeable—even with the A/C running.


Overall, I’m very satisfied with the purchase. It delivers the drivetrain improvements you’d expect from an upgraded rear motor mount while still maintaining daily drivability.

Shout out to unity performance for helping me with the order!

 

[lando]

I spent some time researching several rear motor mount options including Hardrace, PRL Motorsports, Wunderladen Racing, 27WON Performance, and COBB Tuning. By nature of the modification, all of these mounts aim to achieve similar goals: reducing drivetrain slop, minimizing wheel hop, improving power transfer, and making shifts feel more direct and engaging. The real differentiator tends to come down to NVH tolerance and how much an individual driver is comfortable with. Some people actually prefer a bit of NVH since it adds to the more aggressive, connected driving feel.

What drew me to the COBB mount specifically was the dual-durometer bushing design. The split-spoke construction also stood out to me since it may help with vibration reduction and heat management. On this platform, the rear motor mount sits very close to the front pipe, which is a major source of heat transfer. My understanding is that better heat control can help maintain more consistent bushing performance over time since excessive heat can soften or degrade the material.

COBB advertises little to no NVH after a break-in period of around 200 miles, which was another reason I decided to give it a try. I also heard very positive feedback about the Wunderladen mount, which similarly uses a dual-durometer approach.

Upon initial startup after installation, there was a noticeable increase in NVH inside the cabin. However, as I’ve continued to put miles on the car, that has gradually subsided. Under normal driving conditions, the car now feels smoother yet more connected to the drivetrain. Shifts feel crisper and more direct, and side-to-side shifter movement feels slightly tighter. The car also seems to put power down more efficiently, with reduced drivetrain loss and noticeably less delay between shifts.

From a performance standpoint, the mount checks all the boxes I was hoping for. Based on how the NVH has continued to settle, I’m confident it will end up feeling very close to OEM levels once fully broken in.

A friend of mine who lives near COBB’s headquarters had the opportunity to ride in their development car, which is well past the break-in period. According to him, NVH was barely noticeable—even with the A/C running.


Overall, I’m very satisfied with the purchase. It delivers the drivetrain improvements you’d expect from an upgraded rear motor mount while still maintaining daily drivability.

Shout out to unity performance for helping me with the order!

Thank you for the response, and sharing your experience with the Cobb RMM. This sounds right up my alley with what I'm trying to get from a RMM. I was on the fence with the Cobb and PRL RMM, I think you just helped me make up my mind.

 

[theschwartz]

I have one waiting to go in, just waiting to get another project out of my garage first.

By the reviews that I saw, it seems to be the "best of both worlds" option that you're describing.

We must have read the same reviews. I have one waiting in my garage to go in as well.

 

[gerryman81]

I've got the Cobb RMM as well. My experience is very similar to others. After the break in I don't notice an increase in NVH anymore. Car feels more connected especially when shifting 1st-2nd-3rd. Easy to install, just make sure to have a rubber mallet handy to push it into place.

 

[rwong324]

We must have read the same reviews. I have one waiting in my garage to go in as well.

Don’t wait! Just install it. Quickest installation

 

[rwong324]

Thank you for the response, and sharing your experience with the Cobb RMM. This sounds right up my alley with what I'm trying to get from a RMM. I was on the fence with the Cobb and PRL RMM, I think you just helped me make up my mind.

Glad it helped! Just don’t panic during the initial start up once you install it. It will subside significantly as the mileage racks up.

 

[Chilly613]

We have a couple of customer reviews for it so far, and I’ll ask another FL5 friend and customer who hasn’t yet left a review to perhaps chime in on this thread.

I have one waiting to go on my car after I do at least 600 miles on my Wunderladen Street RMM first.

Cant wait to hear your comparison between the 2 RMMs.

 

[seabassi702]

I’m also in the market for a RMM and Cobb had caught my interest as well. Any websites that have it in stock? Cobbs website has it on back order currently

 

[Clark_Kent]

Try @SBX Performance they may have some on hand.

 

[ValkenDnB]

I’m also in the market for a RMM and Cobb had caught my interest as well. Any websites that have it in stock? Cobbs website has it on back order currently

https://unity-performance.com/products/cobb-rear-motor-mount-rmm-22-civic-23-integra

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