I currently have poly strut mounts and am not thrilled with the extra nvh it adds. It's not a huge amount, but noticeable. My question is, are there any rubber mounts that come close to poly for longevity?
Best "rubber" strut mounts?
eagleknight97
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The Elastomer 1590BK are a lot better!
My click was a loose nut and bolt of the driver side radius arm...
Either way, I am very satisfied with the SuperPro SPF1590AK (polyelast) mounts so far (it's been a good month).
I've read that the SuperPro SPF1590AK (polyelast) bearing is "better" since it uses the updated Chevy SS bearing while the SuperPro SPF1590BK (polyurethane) bearings are of the older design/style which came standard on the GTOs and G8s.
Either way, I am very satisfied with the SuperPro SPF1590AK (polyelast) mounts so far (it's been a good month).
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The SuperPro 1590BK is Elastomer not PolyurethaneWell, the differences between the SPF1590AK (polyelast) and SPF1590BK (polyurethane) are quite obvious.
See the all rubber/polyelast construction (SPF1590AK - polyelast) and the dull rubber-looking material vs. the metal construction/sleeve under the bearing (SPF1590BK - polyurethane) and the shiny and hard plastic in the following pictures for comparison.
SPF1590AK (polyelast):
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SPF1590BK (polyurethane):
![Image]()
Enough to increase NVH in my opinion. I suspect your OEM rubber ones will be similar in construction to the SPF1590AK (polyelast) strut mounts.
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Wow
This is an active thread in 2017, 8 years after the G8 dried up and proves there is still a lot to learn as well as aftermarket support.
Want to have my LCA fix done soon at a dealer and seeing if I can get some new strut mounts on hand for them to install at the same time, instead of doing this myself. Was going to just get some stock replacement ones or the rubber ones on gtog8ta.com but kept hearing about Superpro bushings, which I hadn't read of on here until more recently when I actually started paying attention to the forum again for the first time in a few years.
Found this thread today and pretty much convinced I shouldn't want real heavy duty poly bushings because the roads here are horrendous.
Looks like the softer ones will work for me - it's just a regular driver, nothing crazy.
This is an active thread in 2017, 8 years after the G8 dried up and proves there is still a lot to learn as well as aftermarket support.
Want to have my LCA fix done soon at a dealer and seeing if I can get some new strut mounts on hand for them to install at the same time, instead of doing this myself. Was going to just get some stock replacement ones or the rubber ones on gtog8ta.com but kept hearing about Superpro bushings, which I hadn't read of on here until more recently when I actually started paying attention to the forum again for the first time in a few years.
Found this thread today and pretty much convinced I shouldn't want real heavy duty poly bushings because the roads here are horrendous.
Looks like the softer ones will work for me - it's just a regular driver, nothing crazy.
Chevy SS Forum - View Single Post - Bearing blowout - note further PN update from GM: 92284577
full thread
Been away for awhile--own a PPV, and I need to get my post-count up so I can post something for sale. PM me if you want to know what it is.
I am very satisfied with the SPF1590AK (polyelast - rubber feel, polyurethane durability) mounts that I purchased and installed. The lifetime warranty also sealed the deal.
It's good to have a GM solution that hopefully works but I am tired of disassembling the struts and shocks on this vehicle.
No, it's not.
SuperPro 1590BK is made of polyurethane:
SuperPro pushes innovation edge | AAAA
GTO Front Strut Mount with Bearing | SuperPro SPF1590AK
Possibly due to the updated bearing that comes standard in the VF.
I look forward to seeing the long term results from the updated GM design.
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Read through this thread and glad to see you are happy with your SPF1590AK strut mounts. I just got a set last week, intending to put them on this weekend. I will try to post my impressions when I am done.
On my previous GTO, I had Lovells poly upper strut mounts. The increase in NVH was noticeable, but it did not bother me to the point where I wanted to change them again. I am hoping these SPF1590AK mounts prove to be a sturdy replacement without the increase in NVH.
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One thing I learned the other weekend , when I did a mount and spring change. I found the AK and BK mounts are 2 different heights. The AK polyelast are the stock height.
The firmer Poly BK mounts are about 3/8" shorter. So if you want to close the front fender to tire gap a bit. the BK mounts are your ticket. If you want to restore ride height and performance from collapsed mounts. the AK are what you want. The AK also perform close to OEM rubber mount ride quality. Rubber mounts will always collapse because of the material. The 2 year old BK mounts I removed showed almost no wear. Just signs of the upper and lower washers surfaces. Clean and re-lube the bearing and they are ready to go back into service. Both the AK and BK mounts are great products.
The firmer Poly BK mounts are about 3/8" shorter. So if you want to close the front fender to tire gap a bit. the BK mounts are your ticket. If you want to restore ride height and performance from collapsed mounts. the AK are what you want. The AK also perform close to OEM rubber mount ride quality. Rubber mounts will always collapse because of the material. The 2 year old BK mounts I removed showed almost no wear. Just signs of the upper and lower washers surfaces. Clean and re-lube the bearing and they are ready to go back into service. Both the AK and BK mounts are great products.
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Installed my SPF1590AK strut mounts today. Probably driven only 20 miles total, but they are quiet and smooth as stock. I'll try to update with more time and miles, but these seem like the perfect aftermarket mount.
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Not Sure why you want to argue with me, but SuperPro 1590BK is an Elastomer. Elastomer is a Polymer, a family of chemical compounds that can be found in many synthetic organic materials used as plastics, and
resins. The Super Pro Upper Strut 1590BK mounts are made from low-deflection elastomer, which is known for its high stiffness, low friction and excellent stability.
The 1590AK is PolyUrethane but with different chemical differences - per Your Link "The SPF1590AK is made of SuperPro's new material: Polyelast. Polyelast features the performance, lifespan, durability and structural properties of high quality polyurethane, with the comfort, quiet and isolation properties of traditional rubber"
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Bickering aside :wink3: these threads are why I love forums like this. I'm collecting the parts now to replace my struts and sway bar links this spring when I swap on the summer tires, so this particular topic is super relevant for me. I don't know how old the current suspension is on the car (I've had the car for a year and a half) but the strut mounts in there are REALLY collapsed. Since I've been bargain shopping for PPV struts, I can splurge a bit on the mounts. The SPF1590AKs look like that splurge. Good discussion.
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My SPF1590AK's are doing really well since I installed them in November. Same ride quality as OEM. No signs of any collapse yet. They came with the orange colored bearings which I have seen some information that these may be newer updated bearings. I am happy with mine, would recommend.
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Please beware that that Link Shows 1590BKs not AK even though they state they are selling the AKs
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It is somewhat academic since whatever that vendor eventually ships to me is going right back, but according to the order confirmation I received, they're sending me AKs. I bought a pair of AKs from a member here and they're sitting in my basement parts stash, waiting for some warmer weather and free time to do the suspension rebuild.
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Are you referring to the uninstalled height? Do you think the AK poly mounts compress to roughly to the same installed height as the stiffer BK poly mounts?
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