I have a 2007 GT Deluxe that understeers. The rear also seems a little to soft. On top of that I have a zerooption car excepting 3.55 gears which seems to make the jacked up rear end even worse. MSO Shipping Weight was 3353 lb.

Im thinking about doing just rear springs and/or sway-bar. I know Roush Springs are popular for this.
1. Do you have any options you would recommend for this?
2. The H&R Rear Sport Springs seem like they might be an option?
3. What are the Spring Rates?
4. Would they drop a minimum option car less than the stated amount?
5. Are the rears available seperately from the front?
6. What about the Steeda vs BMR Rear Bar? Steeda site showstheir bar as7/8" (22mm) and your site shows it as +4mm (Stock GT Coupe is 20mm).

PS Sorry for so many questions!

 

I assume you're asking how to decrease the understeer?

There are two ways...

1. get a stiffer rear swaybar (Steeda or BMR).
2. get stiffer rear springs, or adjustable shocks that you can stiffen up...


That will make the car have less understeer, but its not my #1 solution. I would still keep a little understeer BUT, INCREASE the limit at which understeer affects your car. You can do this by improving the suspension in general....

Getting stiffer springs front & rear, stiffer valve shocks, front & rear swaybars.

In otherwords... instead of just working on the rear to get rid of understeer...... Improve the suspension as a WHOLE to increase the limits of the suspension in general.

Hope that makes sense...