The redesigned longer XB4 chassis increases the stability of the car. Several different areas of the chassis were updated to improve the proper chassis flex. 

Optional graphite chassis brace fits in the lower part of the composite brace connected directly to the chassis, generating more stability.  

Composite rear lower brace made from tough composite material. 

Tough composite side guards perfectly fit the chassis to seal against dirt and protect from side impacts.  

Redesigned CNC-machined graphite rear chassis plate is used to raise the rear bulkhead.  

Front brace made from tough composite material.  

Rear brace made from tough composite material. 

CNC-machined graphite wire cover. 

Set of composite parts includes body mount posts, battery mounts and wing shims. 

M3x8 button-head machine screw, hex drive. Set of 10 pieces. 

M3x10 button-head machine screw, hex drive. Set of 10 pieces. 

M3x12 button-head machine screw, hex drive. Set of 10 pieces. 

M3x16 button-head machine screw, hex drive. Set of 10 pieces. 

M3x8 flat-head machine screw, hex drive. Set of 10 pieces.
 

M3x10 flat-head machine screw, hex drive. Set of 10 pieces.
 

M3x12 flat-head machine screw, hex drive. Set of 10 pieces.

 

M3x14 flat-head machine screw, hex drive. Set of 10 pieces.
 

M3x16 flat-head machine screw, hex drive. Set of 10 pieces. 

M3 nylock nut. Set of 10 pieces.