Z1 Motorsports Adjustable Front Upper Control Arms for '90+ Nissan 300zx models.
Available in two different configurations, you may choose to between either the Street or Ultra-light Race Version. As an added bonus, the arms may be converted from either form with relative ease and will not require the purchase of new Front Upper Control Arms.
Inspected, assembled, re-inspected and packaged in house by Z1's trained staff, the front upper control arms arrive ready to install on your Z right out of the box. A professional alignment is strongly recommended after the installation of the arms.
Standard Control Arm Components:
Body - Machined from solid, billet 6061 Aluminum and hard anodized black; the fluid design is not only aesthetically pleasing its form is completely functional. Clearance will not be any issue through the full range of suspension travel. Should the car bound or bottom out, it will get to do so on the bump stops and not on the control arms (thus avoiding the theoretical infinite spring rate of instant zero compression), keeping the car safely controllable in the harshest conditions as Nissan intended. Why aluminum? Weight was at the top of our list for requirements, to add adjustment to the factory arm and even match the weight without being heavier was a steep challenge.
Adjuster - Machined from Stainless Steel, the adjuster is a critical part of the arm for both safety as well as adjustability. Careful consideration was taken to ensure maximum adjustability without compromising safety or increasing the arms' overall weight unnecessarily. Stainless was used for long life while offering a great strength in a compact size. We even had you alignment tech in mind when designing these parts, featuring a double adjuster alignment changes are quick and easy with a turn of this jewel. Even selecting the size of the part features like the adjuster hex and the jam nut size was important; it can be tight working in this area of multilink suspension so keeping lock nuts a reasonable size and centralized was important to us. Even if you don't have a 27mm and 30mm wrench to tighten these up, you should be able to succeed with a reasonable sized crescent wrench.
Jam Nuts - Not readily available before production in our desired size custom LH and RH thread jam nuts were spec'd, and like the rest of these components not only were their outer dimensions spec'd even the thread class was specified. To continue with the corrosion resistance these fasteners are also produced in Stainless Steel.
STREET VERSION:
Due to the fact that majority of the 300zx's today are either driven exclusively on the street or are dual purpose vehicles, seeing occasional track usage, most customers prefer to have an aggressive and crisp handling suspension without the increased harshness and ride discomfort. With this in mind, Z1 has created the STREET VERSION of the Z1 Motorsports Front Upper Control Arms. Pairing up with Energy Suspension, an industry leader in aftermarket polyurethane bushings for the automotive industry, a custom bushing set was created to balance overall driving performance while ensuring ride quality. An added indirect feature of the STREET Version's use of bushings is that there is no need for solid tension rods to "protect" the bearings like in the majority of current arms on the market. Weighing in at 3.85 lbs each, the STREET Version matches with weight of the OEM Upper Control Arms and mimics a similar ride quality/comfort.
ULTRA-Light RACE VERSION:
The ULTRA-Light RACE Version of the Z1 Motorsports Front Upper Control Arms are designed for the serious driving enthusiast or a "track use only" 300zx. Using NSK double sealed ball bearings, the ULTRA-Light RACE Version provides the most direct and uncompromising driver feel. Weighing in at 3.25 lbs per arm, the ULTRA-Light RACE Version is over half a pound lighter than the stock arms and is MUCH lighter than its competitors.
Z1 Motorsports: Adjustable Front Upper Control Arms - 
