Cobb Rear Motor Mount for Fiesta ST - Installed Review

[Shmi]

Mine settled in nicely after only 1-200 miles or so. There is vibration at idle with AC on.

 

[Colin1337]

The RMM is a great upgrade, but I kinda want more lol.
It solved the knocking issue from 1st-2nd, but now I get a decent amount of wheel hop.
Maybe a solid trans mount or upper mm would help a bit more

 

[ukilledkenny]

Mine just showed up but it looks like it's gonna start pouring. Really wanna install it right now.

 

[Etyrnus]

I'm on the stock tune, but it made a very noticeable difference. And Colin, I think you're on the money about the upper mount, the amount of movement available to the engine after the RMM is still surprising. My friend was at the dyno with me when I got my baseline, and he commented that if it moves that much with the RMM, it must have been scary with the stock mount.

 

[bobjob]

Vibration with ac at idle seems to have lessened for me. I don't really notice it anymore.

 

[ukilledkenny]

Installed and taken out for a bit of a test. Definitely glad I made this my first mod.

Install was easy even for a newb at getting under cars like me. The extension I had was only 3 inches and it was still workable.

 

[BlueBomber]

Yup, installation is a snap. I've had mine in for a while now and I hardly notice it anymore.

Hey, just a heads up to anyone local - for the first FIVE customers to buy a Cobb Rear Motor Mount at ModBargains in La Habra, CA, we're also offering free installation for the first five FiST owners that take us up on it. I'm not the salesperson, but I think that's a great deal for anyone iffy about doing it themselves; we can take care of it for you in half an hour or less. It's MUCH easier to install the Cobb RMM than trying to swap out the bushings, let me tell you that.

Still love mine and it's a smokin deal for anyone local!

 

[EdwardFdz]

Loved the shifting from 1st to 2nd! =)

 

[Oyster]

Amazing upgrade! Stock rmm is such a sloppy blob. Night and day difference.

 

[boombots]

Awesome for banging gears. 1st to 2nd and to 3rd at WOT are awesome. Dislike the nasty rumble with AC on...

 

[WeTheNorth]

Just got this installed not too long ago, still can feel the engine move at times, if I could do it again I would go boomba. Needs to be a stiffer RMM imo

 

[commonplatypus]

Did you torque it down appropriately?

 

[WeTheNorth]

Got it installed by a shop, they're a Cobb dealer and been around for eons, so I'm guessing it's done right, do u feel anything under you butt when u shift? Maybe I feeling the tranny??

 

[commonplatypus]

I do not experience much else other than vibrations through the steering wheel and shift knob. Even though it was installed by a Cobb dealer, I would still make sure it is torqued to the appropriate 50 ft/lbs that Ford recommends those engine studs to be at. The upper nuts connecting the downpipe bracketing should be tightened with a "heft and a half" sort of effort in my opinion. Tightening those too much can sheer them off. Ask me how I know.

 

[WeTheNorth]

I do not experience much else other than vibrations through the steering wheel and shift knob. Even though it was installed by a Cobb dealer, I would still make sure it is torqued to the appropriate 50 ft/lbs that Ford recommends those engine studs to be at. The upper nuts connecting the downpipe bracketing should be tightened with a "heft and a half" sort of effort in my opinion. Tightening those too much can sheer them off. Ask me how I know.

When I am shifting from 1👉🏼2 I can still feel the engine move like before, only improvements I can honestly speak on is, at higher rpms it feels more solid but the 1👉🏼2 even 2👉🏼3 it feels

 

[JWA]

If you decide to buy one of the stiffer options, I'm looking for a used Cobb RMM.

 

[WeTheNorth]

If you decide to buy one of the stiffer options, I'm looking for a used Cobb RMM.

Probably hold on to it now, I'm from Canada and with the exchange I just paid an arm and a leg for this

 

[JWA]

I ordered the stage 1 package from ModBargains and installed it today. After a good test drive, I think that the RMM is perfect. There might be slightly more vibration at idle, but it just feels like a stock sports car. Not over the top modded. My biggest concern with the stock RMM was the yoyoing when taking off, even at normal city speeds. That is now eliminated completely and it is just smooth and progressive. Shifts are now smoother, and I was surprised how much I remembered the engine rocking when under braking before installing it. Very satisfied.

 

[stuntdoogie]

I ordered the stage 1 package from ModBargains and installed it today. After a good test drive, I think that the RMM is perfect. There might be slightly more vibration at idle, but it just feels like a stock sports car. Not over the top modded. My biggest concern with the stock RMM was the yoyoing when taking off, even at normal city speeds. That is now eliminated completely and it is just smooth and progressive. Shifts are now smoother, and I was surprised how much I remembered the engine rocking when under braking before installing it. Very satisfied.

Now get yourself a shortshift adapter and youll be happier. Got mine from boomba.

 

[Bonesaw]

So does the AC ON vibrations ever go away or settle down dramatically... or it is what it is?