The steel tie bar strengthens the front bulkhead and suspension arms

For these models:
Drag Slash Chevrolet C10 
Drag Slash Ford Mustang
Slash 2WD Unassembled Kit
Slash 2WD XL-5 
Bandit XL-5
BIGFOOT No. 1 XL-5
Rustler 2WD XL-5
Stampede 2WD XL-5 w/Battery