| on the SPLparts website. [ http://splparts.com/Parts/Z32/Suspension/Bracing/default.asp ] SPL urethane chassis foam High density rigid closed cell urethane foam can be injected into various hollow parts of a monocque chassis to provide addtional structural strength. For example, a foam filled frame rail becomes much more rigid and resists flexing. Carefully done, urethane foam injection can yield higher chassis strength without the excessive weight from using metal structures. Caution: urethane foam once set is permanent. In case of an accident, the foam cannot be repaired and it my be necessary to replace the entire panel that was foam injected.
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