The Sub frame spacers pre-load the stock rubber bushings so the body does not float separately from the sub frame. Without these spacers, the body floats about an inch before the suspension actually works causing unwanted wheel hop during acceleration and body sway during cornering.

Pre-loading the stock bushings results in much more responsive handling and also greatly reduces wheel hop. Advantages of the spacers over Delrin and aluminum replacements include noise isolation and vibration through retaining the stock rubber mounts.

Installation is also painless as complete removal of the sub frame is not required. These 4 piece bottom only preloading spacers are designed to give the best possible overall performance and do not compromise the integrity of the stock liquid filled bushings.