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I would just spend the little extra money and get the mountain pass arms. They are proven.
MPP - $390 shipped to USA (even after 10% off)
Truhart - $187 shipped.
Not sure 110% more is "just a little". I appreciate what MPP and others have done, but it's nice to have some solutions more focused on cost. At some point, someone has to try the new stuff, or nothing else becomes "proven." That's why I was asking if anyone had. The Truhart stuff gets pretty good reviews on Amazon for other cars. It's not like a adjustable length control arm is rocket science.
We need them to make some camber adjustable FUCAs for us- They have really well rated ones for the Civics for under $200 a pair.
You get what you pay for.
True, but the Tesla performance suspension market is pretty thin at this point, so pretty it's hard for the low-margin high-volume model to work unless nearly zero effort went into engineering.Anyone that has worked in volume production very much knows that you don't get what you pay for. Low volume things are often very expensive and not well engineered.
So should get the Unplugged ones or the SPL ones? They cost more than MPP so they must be better. Also, that's like saying an aftermarket lug nut at $10 or $200 "isn't very much"- ratios do matter.
Anyone that has worked in volume production very much knows that you don't get what you pay for. Low volume things are often very expensive and not well engineered.
Looking at photos for other cars, they look like cheap rubber bushings. In fact, in general, I would say the Truhart parts look pretty shoddy, though part of that is just because of the stamped steel look. I'm sure they are functional, otherwise they wouldn't be in business. But I wouldn't expect the same longevity nor weight reduction you get with the more expensive brands.
I wanted to add one more huge difference: MPP and UP products are developed on the track for racing applications.
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OTOH if you don't care about tracking, or the kind of R&D that goes into the other brands, then by all means, buy the cheap ones!
You should buy whatever you want to buy.
You get what you pay for. cheap parts are cheap for a reason, not because they don't feel like charging you more. It's cause they are crap.
The Truhart arms are steel with what appears to be a rubber bushing. The adjustment of those arms is a lot more work than the MPP ones (which are aluminum with sealed spherical bushings). I've had both styles of adjustment, and the MPP approach is far superior.
Truhart arms should offer similar performance to the stock arms, whereas the MPP arms would offer notably improved dynamics.
I would not be surprised if the Truhart bushings wore out quickly with track use. Unfortunately, most aftermarket rubber bushings are not heavy duty or made to withstand track abuse, especially on a 4,100lb car.