spc adjustable arms streetable?
Le Mans Master
Joined: Oct 2007
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From: Akron Ohio
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Based on my own control arm design, I would assume they added that to protect themselves. They probably chose not to test them for pothole impacts or hitting a curb and cannot guarantee they will not bend or brake. Im sure they will be just fine, and actually ride better than the OEM arms. Just don't hit anything.
Thread Starter
Pro
Joined: Mar 2008
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Based on my own control arm design, I would assume they added that to protect themselves. They probably chose not to test them for pothole impacts or hitting a curb and cannot guarantee they will not bend or brake. Im sure they will be just fine, and actually ride better than the OEM arms. Just don't hit anything.
Le Mans Master
Joined: Oct 2007
Posts: 9,726
Likes: 3,510
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Most likely they are just as strong. Since they are marketed as race arms they are probably just covering their butt by adding the statement "not for street use". I dont see any reason why they would be weaker, or not OK on the street.
Team Owner
Joined: Dec 1999
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
I would think that they don't want any "product liability" issues and their attorneys have most likely told them that is one way to cover their butts. Could also be that it may be a matter of not testing the arms so they wouldn't know if they met any OEM/GM design spec.It looks like the SPC upper arms are steel and they could be stronger than the stock C4 cast aluminum upper control arms. Steel may be stronger but with the turnbuckle-style adjustability, that may be an issue in overall strength.
A friend has the SPC arms on his 84 and at a track day a couple years ago he hit a tire wall and bent one of them. Speed wasn't very high (60-70 maybe) but it was a glancing blow and the front corner of the car was the first thing to hit the wall.
Drifting
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From: East Wenatchee (2hours from n e where) WA
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They are "streetable". I have the ones without bushings and they are great no poly bushing squeaking sounds 
SPC also sells a set with bushings. All for sale at Summit Racing
SPC also sells a set with bushings. All for sale at Summit Racing
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Le Mans Master
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
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St. Jude Donor '12
Not that bad, what do you think new A-arms cost?
With these you can adjust camber and caster to get it exactly where you want it.
I want a set of these soooooo bad, just can't aford the points in my race class. I'd have to go to a less sticky tire
With these you can adjust camber and caster to get it exactly where you want it.
I want a set of these soooooo bad, just can't aford the points in my race class. I'd have to go to a less sticky tire
