Engine braces..
 

I think i have that rite but you know what i am talking about like the ones on the new cop cars like the impalas my step dads impala (cop car) has engine braces on it .......does that improve anything?.....also my friends pontiac has them and it is stock..

hi bud yep that really do work they make the car more stiff so you get better cornering and stuff like that and if you have loads of horse power it stops the car body from twisting if you need any help just add me conradhooton@hotmail.com

I swapped my stock strut tower bar for a brace. It makes a nice difference in turn-in and high-speed tracking. :)
http://www.msprotege.com/members/Natey/install-8.jpg