Now that I've had both rear motor mounts on my car I figured I would post a review for those who can't decide which is the right one for them.
I had the stock RMM for around 7-8k miles and got sick of wheel hop and the occasional engine hitting the firewall. I had made it to stage 2 with the stock mount, and remained stage 2 through owning both mounts.
I bought a Boomba RMM and ran it for about 2k miles. My thoughts were that it eliminated the engine hitting the firewall and nearly eliminated wheel hop at the cost of a great deal of noise, vibration and harshness (NVH). It also made shifts feel tighter or "crispy" as I've described it; an improvement in shift feel. But seeing as how I'm not taking my car to the track and most of my driving is around town, I grew tired of the cabin shutter taking off from a stop.
Side story I tried to get rid of some NVH by tightening things up and sheared off one of the downpipe studs. That was not fun.
Next I purchased the Cobb RMM. This one was also used and broken in. I see this mount as the compromise between stock and Boomba. Shifts don't feel as tight and it just doesn't seem to put down power as well as the Boomba, but the engine doesn't hit the firewall and wheel hop is controlled nearly as well as the Boomba. And there is way less NVH. On a scale of 0-9 for NVH, stock is 1, Cobb is 2, and Boomba is 6. I can only sense any vibes with the AC on at very low rpm and even then they are minimal. This is what I have now and what I decided to keep.
I snapped a pic of the 3 lines up, and I think this illustrates the difference between them.
The Cobb is nearly the same size as stock with smaller voids. The Boomba has no voids and much less dampening which translates to more vibrations in the cabin, but less engine movement.
So end of story, one isn't strictly better than the other but one will be better for (insert italics) you that the other. So you might want the...
...Boomba RMM
if you are willing to sacrifice NVH for superior engine movement restriction and "because race car" lol. This one is probably better for the track (not my wheelhouse so I don't know) or large power increases. It's personally not for me, but that is just me.
...Cobb RMM
if you are only willing to sacrifice the slightest NVH for a reduction in wheel hop and engine movement. This one seems better for the daily driver with modest additional power.
...stock
if you want the absolute most minimal NVH and you are fine with trading off for engine movement.
I had the stock RMM for around 7-8k miles and got sick of wheel hop and the occasional engine hitting the firewall. I had made it to stage 2 with the stock mount, and remained stage 2 through owning both mounts.
I bought a Boomba RMM and ran it for about 2k miles. My thoughts were that it eliminated the engine hitting the firewall and nearly eliminated wheel hop at the cost of a great deal of noise, vibration and harshness (NVH). It also made shifts feel tighter or "crispy" as I've described it; an improvement in shift feel. But seeing as how I'm not taking my car to the track and most of my driving is around town, I grew tired of the cabin shutter taking off from a stop.
Side story I tried to get rid of some NVH by tightening things up and sheared off one of the downpipe studs. That was not fun.
Next I purchased the Cobb RMM. This one was also used and broken in. I see this mount as the compromise between stock and Boomba. Shifts don't feel as tight and it just doesn't seem to put down power as well as the Boomba, but the engine doesn't hit the firewall and wheel hop is controlled nearly as well as the Boomba. And there is way less NVH. On a scale of 0-9 for NVH, stock is 1, Cobb is 2, and Boomba is 6. I can only sense any vibes with the AC on at very low rpm and even then they are minimal. This is what I have now and what I decided to keep.
I snapped a pic of the 3 lines up, and I think this illustrates the difference between them.
The Cobb is nearly the same size as stock with smaller voids. The Boomba has no voids and much less dampening which translates to more vibrations in the cabin, but less engine movement.
So end of story, one isn't strictly better than the other but one will be better for (insert italics) you that the other. So you might want the...
...Boomba RMM
if you are willing to sacrifice NVH for superior engine movement restriction and "because race car" lol. This one is probably better for the track (not my wheelhouse so I don't know) or large power increases. It's personally not for me, but that is just me.
...Cobb RMM
if you are only willing to sacrifice the slightest NVH for a reduction in wheel hop and engine movement. This one seems better for the daily driver with modest additional power.
...stock
if you want the absolute most minimal NVH and you are fine with trading off for engine movement.
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