A strut tower bar, also known as a strut brace or strut tower brace, is a pretty common upgrade on many cars and many cars come with one from the factory. However, the question keeps coming up of what a strut bar actually does, is it worth it, and how does it work? Strut bars are designed to tie the tops of your struts together, to reduce chassis flex which improves handling, acceleration and braking. Strut bars are available in many different configurations – front upper, front lower, rear upper and rear lower.
Jason over at EngineeringExplained created an excellent in depth video to show how a strut bar really works, and how it does the most for vehicles with a MacPherson strut suspension setup.