We’ll start with an apology: We spent our last update cutting and grinding our Z-car’s interior, removing as much weight as possible while prepping it for a fresh coat of paint. That’s what this article was going to be about, since finishing the interior is the logical next step in our LS1-swapped 350Z’s transition from street car to race …
Why go with SPC over Z1 Motorsports? SPC is great stuff, but SO expensive. I definitely wouldn't consider Z1 an "off brand"
I'll admit, I made the decision based on spec sheets rather than a head-to-head test. But it was clear that the SPC front upper arms are way beefier than the Z1 parts, and also allow a much broader range of caster and camber adjustment. SPC parts allow more adjustment than the Z1 parts in the rear, too, and they're only slightly more expensive by the time you add the eccentric bolt kits and the race heim joint upgrade to the Z1 stuff.
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