Sport Suspension
 

I have a 90 GMC 1/2 ton Sierra ... Are there any sport suspension kits that are made for my truck??

Depends what you mean by sport. Bell Tech, DJM, and a few others make lowering products for your truck which will also improve the handling. Suspension Techniques has sway bars which will improve the handling even more. Add urethane busings from someone like Energy Suspension. And don't forget a good set of shocks. For these products look to www.stillen.com, or for everything from one manufacturer try www.hotchkis.net. The Hotchkis products are probably a bit "sportier" in terms of handling.

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71 Sierra
98 Sierra