When GM designed the Syclone and Typhoon, the turbine-style aluminum wheels were part of the package and looks of the truck. The wheels are unique to the Syclone and Typhoon only, and feature a front and rear design with the major difference being the offset measurements. The rims are stamped with FRONT and REAR on the backside.
A shared feature between the SyTy wheel and another vehicle is the center cap design. This same design can also be found on the 1988-89 C4 Corvette "Salad Shooter" and Callaway Mag alloy wheel. The SyTy and 1988-89 Corvette caps are interchangeable. During the development of the Syclone, trucks such as the 4.3SS Chevy Syclone Prototype used the Corvette center caps. To cover up the lugs, a large cap with an o-ring gasket is used and is held in place by a single screw with a uniquely styled head. This required a matching-style tool to remove the bolt. The bolt head was manufactured with more than one style of design. The reason for the unique design was to offer a sense of "security" knowing that to get to the lugs, you had to have the bolt removal tool that matched with your truck.
It's common to see the SyTy center cap bolt get destroyed due to the design. Over time, if the bolt becomes stuck due to dirt and grime, it is easy to strip both the bolt and the removal tool, making it almost impossible to loosen and remove the bolt. Another issue we see is the tool gets lost and many will resort to hammers, screwdrivers, and other tools to remove the bolt. We do not recommend this due to the risk of damage that could be caused by not using the correct tools for the job.
The original manufacturer of the center cap bolts and removal tool is still in business today - McGard. They are located in New York. If you need a replacement bolt or removal tool for your truck, you can contact McGard, and send them pictures of the bolt and/or tool and they can match and be able to provide you with a new set.
3875 California Road
Orchard Park, NY 14127-4198
Customer Service: 1-800-444-5847
Ph: 716-662-8980
Fx: 716-662-8985
If you would rather update your center bolt caps without the stress of having to keep up with a tool, SyTy specialists Sportmachines offers a center bolt kit with an allen head screw and even comes with brand new o-rings for your center cap. PURCHASE HERE
This kit includes (4) New O-rings and (4) Stainless allen head bolts for the center caps of the stock Syclone or Typhoon wheels. Everything pictured is what is included. *New - Now includes (1) 8mm allen wrench to tighten down the bolts
