82-92 GM F-Body Boxed Style Subframe Connectors, Weld-In, UMI Performance Now Fits Convertible Models! Minimize chassis flex and increase performance capabilities on your 82-92 GM F-Body with boxed style weld-in subframe connectors from UMI Performance. Subframe connectors are a must chassis upgrade when racing and hard... MSRP: Was: Price: Now: $429.99 - $459.99 Quick view View Options SKU: UMI-2400