Did my car come witha rear sway bar, if I were to get on off a Trans Am would how would tha thelp my car.

 

ONLY
ONLY
ONLY
IF you also remove and USE the FRONT sway bar, too.
IF NOT
You give your car OVERSTEER and that is NOT good.
Must & ALWAYS should match front and rear sway bars, not over do the REAR SIZE and UNDERSIZE the frotn size.
Heck you certainly can buy the rear, just wait until you get a proper sized front one to use it.

 

What Ked said.
But your car should have a front sway bar on it, shouldent it?
My Bird was depribed a rear sway bar but had a front one. If your car is anything like mine (besides powertrain) your going to have to tap the holes in the back so you can bolt the sway bar up. Gm was kind enough to drill them just not tap them, on my bird anyway.
If you were to install a (ANTI-SWAY-BAR) tech name It would firm up the rear end of the car and reduce the amount of body roll, simply put give it more of a sporty "tight" feel. It made a world of difference in my 82 but you also need to adjust the end links properly, No.9999 on my list of things to do.
SSC

 

I upgraded to Iroc front and read.. a$$ load of difference.

 

You could "just" get the rear bar off a trans am. (Just look under your rear axle to see if the anti-sway-bar is there.) Depending on the year of your car (which you didn't mention), you could have the same size front bar as a T/a, and you could use their 21mm (or 23mm, but I think that's an IROC) rear bar. Use all polyurethane bushings on it, thru Summitracing.com. I used greaseable mounting bushings when I put my trans am bar on... it was the "universal" kit. If you get the rear bar, be sure to grab the c-clamps that hold the bar to the axle. They have a notch in them that helps locate the bar on the axle. Go to http://www.energysuspension.com to look up part numbers (online catalog, camaro/firebird, check out page1, then look at page2- the link for page 2 is at the upper right.)

 

my car came with a rear sway bar. just look at my pics to watch it handle in the garage

 

Yea I was thinking the same as Tom, about the anti sway bars being the same (GM isnt know for being original) The only realy beefy rear bar came with a 9 bolt rear. The one on my bird is about the same thickness as the one on my Z28 and the one on the bird came from a 89 3.1 5 speed.
Autozone also has replacement endlinks that are very beefy and come with poly bushings 10$ and the mounting bushings run $15/20. saves some shipping fees.

SSC